DIPTI METAL INDUSTRIES
ASTM A671 / A672 Electric Fusion Welded (EFW) Pipes Manufacturer, Exporter & Supplier in Mumbai, India | Global Worldwide
Dipti Metal Industries manufactures, supplies, exports & stocks ASTM A671 / A672 Electric Fusion Welded (EFW) Steel Pipes fabricated from pressure-vessel quality plates across multiple alloy systems and strength levels. These large-diameter pipes are primarily intended for atmospheric and lower-temperature service (A671) or high-pressure service at moderate temperatures (A672) and are widely used by oil & gas, power, petrochemical, water & desalination, and shipbuilding sectors. We offer a comprehensive range of pipe grades derived from various plate specifications, available in multiple classes (10–73) which define radiography (RT), pressure test, and heat treatment requirements. With schedules ranging from 5 to XXS, full NDE options (RT/UT/Hydro), and various external/internal coatings, we ensure high integrity, custom solutions, and fast global deliveries backed by EN 10204 3.1/3.2 certification.
Overview: Dipti Metal Industries' Leadership in ASTM A671 / A672 EFW Pipe Manufacturing & Supply
Dipti Metal Industries is a premier ASTM A671 / A672 Electric Fusion Welded (EFW) Steel Pipes manufacturer, supplier, exporter & stockist of high-quality pipes from our advanced facilities in Mumbai, India. Recognized globally for our expertise in large-diameter industrial piping, we provide essential components for ensuring the safety and efficiency of fluid transfer systems across various sectors. Our ASTM A671 pipes are specifically fabricated from pressure-vessel quality plates and are ideal for atmospheric and lower-temperature service, while ASTM A672 pipes are designed for high-pressure service at moderate temperatures, both offering robust performance.
With decades of experience, Dipti Metal Industries manufactures EFW pipes in strict adherence to international standards, primarily **ASTM A671 / ASME SA671** and **ASTM A672 / ASME SA672**. These pipes are produced from rolled plates, allowing for flexibility in dimensions and material properties derived from the plate specifications. We offer a comprehensive range of pipe grades and classes, with extensive options for heat treatment, non-destructive examination (NDE) such as full radiography (RT) or ultrasonic testing (UT), and hydrostatic testing. Our commitment to precision manufacturing, rigorous quality control, full heat traceability, and comprehensive **EN 10204 3.1/3.2 certification** makes us the trusted partner for dependable and long-lasting piping solutions globally, ensuring the operational success of critical oil & gas, power generation, petrochemical, water, and shipbuilding projects.
Key Features & Benefits of Dipti Metal Industries' ASTM A671 / A672 EFW Pipes
Dipti Metal Industries' ASTM A671 / A672 Electric Fusion Welded (EFW) Pipes are expertly engineered and manufactured to provide essential functions that ensure the highest level of reliability and safety in diverse industrial environments. Here are the key features and the significant benefits they deliver:
- Fabricated from Pressure-Vessel Quality Plates: EFW pipes are formed from high-quality pressure vessel plates, allowing for superior material control, diverse alloy options (carbon, carbon-manganese, alloy, nickel steels), and enhanced strength, particularly in larger diameters.
- Broad Temperature Service Range: ASTM A671 covers pipes for atmospheric and lower-temperature service, while A672 is for high-pressure service at moderate temperatures, offering versatility for various process conditions.
- High Customization & Flexibility: The plate-based manufacturing process allows for extensive customization in terms of exact Outer Diameter (OD), Wall Thickness (WT), and length, accommodating specific project requirements beyond standard seamless pipe limitations.
- Defined Classes for Quality Assurance: Pipes are available in various "Classes" (10–73) which specify the extent of radiography (RT), hydrostatic testing, and required heat treatment, providing transparent and traceable quality levels.
- Excellent Weld Integrity: The electric fusion welding process, combined with stringent non-destructive examination (NDE) and potential post-weld heat treatment, ensures robust, high-integrity weld seams capable of withstanding demanding operational stresses.
- Comprehensive Testing & Certification: Supplied with full EN 10204 3.1/3.2 Material Test Certificates (MTCs), ensuring full heat traceability, chemical analysis, mechanical test results (including impact tests where applicable), and NDE records (e.g., RT/UT reports).
- Corrosion Protection Options: Can be supplied with various external coatings (3LPE, 3LPP, FBE) and internal linings (epoxy) to provide enhanced corrosion resistance for long-term asset integrity in aggressive environments.
- Cost-Effective for Large Diameters: For large-diameter piping, EFW pipes often offer a more economical solution compared to seamless alternatives while still delivering high performance.
Our Comprehensive Product Range: ASTM A671 / A672 Electric Fusion Welded (EFW) Pipes
Dipti Metal Industries manufactures, stocks, and supplies an extensive and high-quality range of ASTM A671 / A672 Electric Fusion Welded (EFW) Steel Pipes from Mumbai, India. We offer diverse product forms, grades, classes, sizes, and schedules, custom-engineered to meet the precise requirements of your industrial applications globally.
1. Standards & Product Forms
- Standards: ASTM A671 / ASME SA671 (for atmospheric and lower temperatures), ASTM A672 / ASME SA672 (for high-pressure service at moderate temperatures).
- Product Form: Electric Fusion Welded (EFW) – Fabricated from pressure-vessel quality steel plates by forming and welding longitudinal seams.
2. Supply Range (Dimensions)
- Outer Diameter (OD): Typically 16" NB (DN400) and above. Smaller custom diameters can be supplied upon request, provided all A671/A672 requirements are met.
- Wall Thickness (WT): Typically 6 mm (¼”) and above. Available across a wide range of thicknesses to meet specific design pressures.
- Schedules: Sch 5, Sch 10, Sch 20, Sch 30, Sch 40 (STD), Sch 60, Sch 80 (XS/80S), Sch 100, Sch 120, Sch 140, Sch 160, Sch XXS – conforming to ASME B36.10M.
- Lengths: Single Random Length (SRL) from 3 to 7 meters, Double Random Length (DRL) from 6 to 14 meters, or custom cut lengths up to 18 meters as per project requirements.
- Ends: Beveled End (BE) for welding, Plain End (PE), Threaded (NPT) for small bore connections.
ASTM A671 / A672 EFW Pipes: Pipe Grades (Plate Source Mapping)
The grade designation for ASTM A671 and A672 pipes is derived from the specific pressure vessel quality plate standard used for fabrication and the associated strength level. This mapping allows for a wide range of material properties to suit diverse application requirements.
| Pipe Grade | Steel Type | Plate Specification | Plate Grade / Class |
|---|---|---|---|
| CA 55 | Plain carbon | A285/A285M | Grade C |
| CB 60 / 65 / 70 | Plain carbon, killed | A515/A515M | Gr 60 / 65 / 70 |
| CC 60 / 65 / 70 | Plain carbon, killed, fine grain | A516/A516M | Gr 60 / 65 / 70 |
| CD 70 / 80 | Mn–Si; normalized / Q&T | A537/A537M | Class 1 / Class 2 |
| CFA 65 / CFB 70 / CFD 65 / CFE 70 | Nickel steel (LTCS) | A203/A203M | Gr A / B / D / E |
| CG 100 | 9% Ni (Cryogenic) | A353/A353M | — |
| CH 115 | 9% Ni (Cryogenic) | A553/A553M | Type 1 |
| CJA/B/E/F/H/P 115 | Alloy steel, Q&T | A517/A517M | Gr A / B / E / F / H / P |
| CK 75 | Carbon–Mn–Si | A299/A299M | Gr A |
| CP 85 | Alloy steel, age hardening | A736/A736M | Gr A, Class 3 |
Note: Nickel and other alloy systems (e.g., CFA, CG, CH) are typically used for low/cryogenic temperatures or high-strength applications. Plain carbon systems (e.g., CA, CB, CC) primarily cover atmospheric to lower-temperature service (ASTM A671) or moderate temperature high-pressure service (ASTM A672). The exact mechanical properties and suitability are derived from the specified plate material and any subsequent heat treatment.
ASTM A671 / A672 EFW Pipes: Pipe Classes (10–73)
The "Class" designation in ASTM A671 and A672 specifies the type of heat treatment performed after welding, the extent of radiography (RT) applied to the weld seam, and the type of pressure test. This allows clients to select a pipe quality level precisely matched to their application's criticality and design requirements.
| Class | Heat Treatment (After Welding) | Radiography (NDE) | Pressure Test |
|---|---|---|---|
| 10 | None | None | None |
| 11 | None | 9 (Full-length Weld RT) | None |
| 12 | None | 9 (Full-length Weld RT) | 8.3 (Hydrostatic per A530/A530M) |
| 13 | None | None | 8.3 (Hydrostatic per A530/A530M) |
| Classes with Stress Relieving Heat Treatment | |||
| 20 | Stress relieved | None | None |
| 21 | Stress relieved | 9 (Full-length Weld RT) | None |
| 22 | Stress relieved | 9 (Full-length Weld RT) | 8.3 (Hydrostatic per A530/A530M) |
| 23 | Stress relieved | None | 8.3 (Hydrostatic per A530/A530M) |
| Classes with Normalizing Heat Treatment | |||
| 30 | Normalized | None | None |
| 31 | Normalized | 9 (Full-length Weld RT) | None |
| 32 | Normalized | 9 (Full-length Weld RT) | 8.3 (Hydrostatic per A530/A530M) |
| 33 | Normalized | None | 8.3 (Hydrostatic per A530/A530M) |
| Classes with Normalized + Tempered Heat Treatment | |||
| 40 | Normalized + Tempered | None | None |
| 41 | Normalized + Tempered | 9 (Full-length Weld RT) | None |
| 42 | Normalized + Tempered | 9 (Full-length Weld RT) | 8.3 (Hydrostatic per A530/A530M) |
| 43 | Normalized + Tempered | None | 8.3 (Hydrostatic per A530/A530M) |
| Classes with Quenched + Tempered Heat Treatment | |||
| 50 | Quenched + Tempered | None | None |
| 51 | Quenched + Tempered | 9 (Full-length Weld RT) | None |
| 52 | Quenched + Tempered | 9 (Full-length Weld RT) | 8.3 (Hydrostatic per A530/A530M) |
| 53 | Quenched + Tempered | None | 8.3 (Hydrostatic per A530/A530M) |
| Classes with Quenched + Precipitation HT Heat Treatment | |||
| 70 | Quenched + Precipitation HT | None | None |
| 71 | Quenched + Precipitation HT | 9 (Full-length Weld RT) | None |
| 72 | Quenched + Precipitation HT | 9 (Full-length Weld RT) | 8.3 (Hydrostatic per A530/A530M) |
| 73 | Quenched + Precipitation HT | None | 8.3 (Hydrostatic per A530/A530M) |
Note: Radiography (RT) may be performed before heat treatment. Hydrostatic testing (per A530/A530M) for Classes 12, 13, 22, 23, 32, 33, 42, 43, 52, 53, 72, 73. The selection of class is crucial for specifying the required quality level for each project.
ASTM A671 / A672 EFW Pipes: Heat Treatment Reference
Post-weld heat treatment (PWHT), normalizing, quenching, and tempering ranges are critical for achieving the desired mechanical properties and microstructure in EFW pipes, and these depend heavily on the original pressure vessel plate grade. Below are key references for typical heat treatment parameters (temperatures in °F [°C]). Hold times typically scale with thickness per A671/A672 §5.3.
| Pipe Grade (Plate Source) | PWHT Range [°F (°C)] | Max Normalize [°F (°C)] | Min Quench [°F (°C)] | Temper / PHT Range [°F (°C)] | Notes |
|---|---|---|---|---|---|
| CA55 (A285 Gr C) | 1100–1250 [590–680] | 1700 [925] | — | — | — |
| CB60/65/70 (A515) | 1100–1250 [590–680] | 1750 [950] | — | — | — |
| CC60/65/70 (A516) | 1100–1200 [590–650]C | 1700 [925] | 1700 [925] | 1100 [590]D | C: do not exceed plate temper; D: 1100–1300 if accelerated cooled |
| CD70 (A537 Cl1) | 1100–1250 [590–680] | 1700 [925] | — | — | — |
| CD80 (A537 Cl2) | 1100–1250 [590–680]C | — | 1650 [900] | 1100 [590] | — |
| CFA/CFB/CFD/CFE (A203 A/B/D/E) | 1100–1175 [590–635] | 1750 [950] | — | — | Nickel steels |
| CG100 (A353) | 1025–1085 [550–580] | 1650±25 [900±15]E | — | 1050–1125 [560–605] | E: normalize may be omitted if hot formed 1650–1750 |
| CH115 (A553 Type 1) | 1025–1085 [550–580] | 1450±25 [790±15] | 1475–1700 [800–925] | 1050–1175 [560–635]F | F: optional intermediate HT 1165–1290 prior to temper |
| CJ*115 (A517 A/B/E/F/H/P) | 1000–1100 [540–590] | — | 1650–1725 [900–940] | 1150 [620] | Quenched & Tempered alloys |
| CK75 (A299 Gr A) | 1100–1250 [590–680] | 1700 [925] | — | — | — |
| CP85 (A736 Gr A Cl3) | 1000–1175 [540–635] | — | 1725 [940] | 1000–1225 [540–665] (PHT) | Age hardening alloy |
Note: Where "—" appears, the specification has no explicit heat treatment requirement for that parameter. Hold times for heat treatment processes typically scale with thickness per ASTM A671/A672 §5.3 (e.g., ≥1 hour per inch for stress relief, ≥½ hour per inch for tempering). Always consult the specific standard and qualified Welding Procedure Specification (WPS) for exact details.
Technical Specifications: Dipti Metal Industries' ASTM A671 / A672 EFW Pipes
Our ASTM A671 / A672 Electric Fusion Welded (EFW) Steel Pipes are manufactured to stringent technical specifications, ensuring precise dimensions, reliable performance, and strict compliance with global industry standards for various pressure and temperature pipeline applications.
| Parameter | Specification / Standard |
|---|---|
| Standards | ASTM A671 / ASME SA671, ASTM A672 / ASME SA672 |
| Material Source | Pressure-vessel quality steel plates (e.g., A285, A515, A516, A537, A203, A353, A553, A517, A299, A736) |
| Pipe Grades | CA 55, CB 60/65/70, CC 60/65/70, CD 70/80, CFA/B/D/E 65/70, CG 100, CH 115, CJ* 115, CK 75, CP 85 |
| Pipe Classes | 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 40, 41, 42, 43, 50, 51, 52, 53, 70, 71, 72, 73 |
| Dimensions | ASME B36.10M (Outer Diameter, Wall Thickness, Schedule) |
| Size Range (OD) | Typically 16" NB (DN400) and above (custom smaller available) |
| Wall Thickness (WT) | 6 mm (¼”) and above; Schedules Sch 5 to Sch XXS |
| Lengths | SRL, DRL, Custom Cut (up to 18 meters) |
| Ends | Beveled End (BE), Plain End (PE), Threaded (NPT - small bore) |
| Manufacturing & Testing | |
| Manufacturing Process | Electric Fusion Welding (EFW) from formed steel plates |
| Heat Treatment | As per Pipe Class (None, Stress Relieved, Normalized, Normalized + Tempered, Quenched + Tempered, Quenched + Precipitation HT) |
| Surface Finish (External) | Black/varnished, shop primer, 3LPE / 3LPP / FBE (single/dual layer), Hot-dip Galvanized (for select sizes/specs) |
| Internal Lining | Epoxy coating (if specified) |
| Non-Destructive Examination (NDE) | Radiography (RT - Full-length weld per ASME BPVC Sect. VIII UW-51 for specific classes), Ultrasonic Testing (UT), Eddy Current Testing (ET), Magnetic Particle Testing (MT), Liquid Penetrant Testing (PT) - as per project/class requirements. Plate UT per A435/A577/A578. |
| Mechanical Testing | Tensile, Bend, Flattening/Expansion (as specified by plate standard and A671/A672), Charpy V-notch (CVN) impact (if specified by plate standard or for lower-temp service). Hardness per E110. |
| Pressure Testing | Hydrostatic Test per ASTM A530/A530M (for specific classes). |
| Material Analysis | Plate Product Analysis (one per heat), Weld Metal Analysis (one per 200 ft of weld). |
| Marking | Standard stenciling, indelible marking, QR codes, or barcoding as required. |
| Certifications & Documentation | |
| Mill Test Certificates (MTC) | EN 10204 Type 3.1 or 3.2 with full heat traceability for plate and weld metal. |
| Compliance | ISO 9001:2015, PED 2014/68/EU (if applicable), IBR (Indian Boiler Regulations), NACE MR0175/ISO 15156 (for sour service). |
| Third-Party Inspection (TPI) | SGS, TÜV Rheinland, Lloyd’s Register, Bureau Veritas, ABS, DNV GL (available upon request). |
Dipti Metal Industries ensures that all ASTM A671 / A672 EFW Pipes meet these stringent specifications, providing comprehensive technical data and certification for every order to guarantee unparalleled reliability and performance in critical industrial applications.
ASTM A671 / A672 EFW Pipes: Dimensions & Theoretical Weight Reference
This table provides illustrative dimensions (Outer Diameter, Wall Thickness) and theoretical weights for common Nominal Pipe Sizes (NPS) and schedules as per ASME B36.10M. These values are for reference only, and exact dimensions will adhere to specified standards and client requirements. Our EFW pipes are typically supplied from 16" OD upwards.
| NPS | OD (mm) | Sch 40 WT (mm) | kg/m (Sch 40) | Sch 80 WT (mm) | kg/m (Sch 80) |
|---|---|---|---|---|---|
| 16″ | 406.4 | 12.70 | 123.30 | 21.44 | 203.53 |
| 18″ | 457.2 | 14.27 | 156.40 | 23.83 | 259.08 |
| 20″ | 508.0 | 15.09 | 183.42 | 26.19 | 311.17 |
| 24″ | 609.6 | 17.48 | 255.24 | 30.96 | 441.78 |
| 28″ | 711.2 | 19.05 | 334.40 | 35.71 | 612.30 |
| 30″ | 762.0 | 19.05 | 359.80 | 38.10 | 716.30 |
| 32″ | 812.8 | 19.05 | 385.20 | 41.28 | 831.60 |
| 36″ | 914.4 | 19.05 | 436.00 | 44.45 | 1009.60 |
| 40″ | 1016.0 | 19.05 | 486.90 | 47.63 | 1199.10 |
| 42″ | 1066.8 | 19.05 | 512.30 | 50.80 | 1320.00 |
| 48″ | 1219.2 | 19.05 | 588.60 | 55.58 | 1610.60 |
Note: Theoretical weights are calculated based on a material density (ρ) of approximately 7850 kg/m³. Actual weights may vary with manufacturing tolerances, specific material composition, and any applied coatings. For definitive dimensions and weights, always refer to the latest ASME B36.10M standard, the relevant ASTM A671/A672 plate specification, and the specific Mill Test Certificate for your order.
Key Worldwide Standards for ASTM A671 / A672 Electric Fusion Welded Pipes
ASTM A671 and A672 Electric Fusion Welded (EFW) Pipes are crucial components in systems designed for various pressure and temperature services. Their dimensions, materials, manufacturing, and performance are governed by a range of international and national standards. Adherence to these standards ensures interchangeability, proper fit, and ultimately, safe and reliable operation. Dipti Metal Industries manufactures and supplies EFW pipes conforming to major global standards:
These standards are foundational in North America and widely adopted globally for industrial piping, especially for large-diameter and pressure vessel quality applications.
- ASTM A671 / ASME SA671: Standard Specification for Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures. Defines requirements for pipes made from pressure vessel plates for specific temperature ranges.
- ASTM A672 / ASME SA672: Standard Specification for Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperatures. Defines requirements for pipes made from pressure vessel plates for moderate temperature, high-pressure applications.
- ASME B36.10M: Welded and Seamless Wrought Steel Pipe. This standard defines the dimensions (outside diameters and wall thicknesses/schedules) for pipes.
- ASTM A530 / ASME SA530: General Requirements for Specialized Carbon and Alloy Steel Pipe. Referenced by A671/A672 for general delivery requirements, including hydrostatic testing.
- ASME BPVC Section VIII, Division 1: Pressure Vessels. The welding procedures (WPS/PQR) and NDE requirements often reference this code for pressure vessel fabrication.
- NACE MR0175 / ISO 15156: Material requirements for H2S-containing environments in oil and gas production. Crucial for sour service applications where EFW pipes might be exposed to corrosive conditions.
- Plate Specifications (e.g., ASTM A285, A515, A516, A537, A203, A353, A553, A517, A299, A736): The specific qualities and grades of the steel plates used for pipe fabrication are governed by these standards.
European standards are extensively used across Europe and in many other regions, often with mandatory compliance requirements for pressure equipment.
- EN ISO 15614-1: Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 1: Arc and gas welding of steels and nickel alloys. Relevant for EFW pipe fabrication.
- EN ISO 15609-1: Specification and qualification of welding procedures for metallic materials - Welding procedure specification - Part 1: Arc welding.
- EN 10204: Metallic products - Types of inspection documents. Our MTCs comply with Type 3.1 or 3.2.
- PED 2014/68/EU: Pressure Equipment Directive. Mandatory for pressure equipment (including pipes) within the European Union, requiring specific compliance and certification procedures.
- ISO 3183: Petroleum and natural gas industries – Steel pipe for pipeline transportation systems. Often referenced for large-diameter pipelines.
- IBR (Indian Boiler Regulations): Essential for pipes used in boiler and steam service within India. Our EFW pipes can be supplied with IBR compliance when specified for relevant projects.
- GOST Standards (Russia): Often specified for projects in Russia and CIS countries for industrial piping.
- JIS G3457 / G3458 (Japan): Carbon steel pipes for pressure service / alloy steel pipes for pressure service. Japanese standards for welded pressure piping.
Industries & Applications for Dipti Metal Industries' ASTM A671 / A672 EFW Pipes
Dipti Metal Industries' high-quality ASTM A671 / A672 Electric Fusion Welded (EFW) Steel Pipes are crucial components across a wide range of industries, providing robust and reliable fluid transfer in various pressure and temperature environments. Our solutions are trusted in demanding and large-scale industrial projects worldwide.
- Oil & Gas Industry (Transmission & Distribution): Essential for large-diameter pipelines for crude oil, natural gas, and refined products. Also used in processing plants, terminals, and storage facilities.
- Power Generation: Utilized in main steam lines, cooling water intake/discharge systems, boiler auxiliary piping, and other high-volume fluid transfer applications in thermal, nuclear, and hydroelectric power plants.
- Petrochemical & Chemical Processing: For large-diameter process lines, utility piping, and cooling systems where reliable transfer of chemicals and hydrocarbons at specified temperatures is critical.
- Water Transmission & Desalination: Primary choice for large-diameter water pipelines (potable, raw, wastewater), pumping stations, and critical piping in desalination plants (e.g., seawater intake/brine discharge).
- Shipbuilding & Marine: For large-bore piping systems on vessels (e.g., cargo, ballast, utility lines) and offshore structures, where robust welded construction from plate is advantageous.
- Infrastructure Projects: In various large-scale civil and industrial infrastructure projects requiring high-integrity, large-diameter piping.
- Industrial Cooling Systems: For major cooling loops and heat exchange systems in heavy industries.
- Mining & Mineral Processing: In slurry transport and large-volume water management systems.
The customizability, robust weld integrity, and compliance with stringent international standards of Dipti Metal Industries' ASTM A671 / A672 EFW Pipes make them the preferred choice for ensuring the safety, operational continuity, and longevity of piping systems across these diverse global sectors, especially for large-diameter and high-pressure/temperature applications.
ASTM A671 / A672 EFW Pipes Export Countries & Cities We Manufacture & Supply From India To
Dipti Metal Industries is a proud Worldwide Manufacturer, Exporter, Global Supplier, Leading Dealer, and Biggest Stockist of ASTM A671 / A672 Electric Fusion Welded (EFW) Pipes, with an extensive network. We ensure timely and compliant delivery of our premium products, manufactured in our facilities, to major industrial hubs across the globe, with a strong focus on critical industrial regions worldwide, solidifying our position as a top international manufacturing and trading partner.
Explore Our Global Reach
- Austria: Vienna, Salzburg
- Belgium: Antwerp, Brussels, Ghent
- Bulgaria: Sofia, Plovdiv
- Croatia: Zagreb, Split
- Czech Republic: Prague, Brno
- Denmark: Copenhagen, Aarhus
- Estonia: Tallinn, Tartu
- Finland: Helsinki, Tampere
- France: Paris, Marseille, Lyon (Key for Petrochemical, Power & Infrastructure)
- Germany: Frankfurt, Hamburg, Munich, Düsseldorf (Primary for Chemical, Power, Water & Heavy Industry)
- Greece: Athens, Thessaloniki
- Hungary: Budapest, Debrecen
- Ireland: Dublin, Cork
- Italy: Milan, Rome, Genoa
- Latvia: Riga, Daugavpils
- Lithuania: Vilnius, Kaunas
- Luxembourg: Luxembourg City
- Netherlands: Rotterdam, Amsterdam, The Hague (Key for Oil & Gas, Petrochemical, Water Treatment)
- Norway: Oslo, Bergen (Key for Offshore Oil & Gas, Marine)
- Poland: Warsaw, Krakow
- Portugal: Lisbon, Porto
- Romania: Bucharest, Cluj-Napoca
- Russia: Moscow, Saint Petersburg, Kazan (Primary for Oil & Gas, Power, Water Infrastructure)
- Serbia: Belgrade, Novi Sad
- Slovakia: Bratislava, Košice
- Slovenia: Ljubljana, Maribor
- Spain: Madrid, Barcelona, Valencia
- Sweden: Stockholm, Gothenburg
- Switzerland: Zurich, Geneva, Basel
- Ukraine: Kyiv, Kharkiv, Odesa
- United Kingdom: London, Manchester, Glasgow (Key for North Sea Oil & Gas, Power Generation, Water Infrastructure)
- Afghanistan: Kabul, Kandahar
- Bahrain: Manama, Sitra (Key for Oil & Gas, Water)
- Bangladesh: Dhaka, Chittagong
- Brunei: Bandar Seri Begawan (Key for Oil & Gas)
- China: Shanghai, Guangzhou, Tianjin, Shenzhen (Key for Petrochemical & Power Generation, Water Infrastructure)
- Hong Kong: Hong Kong City
- India: Mumbai, Delhi, Chennai, Kolkata, Bangalore, Hyderabad (Local Markets - Major Industrial Demand)
- Indonesia: Jakarta, Surabaya, Balikpapan (Key for Oil & Gas, Power, Water)
- Iran: Tehran, Mashhad (Key for Oil & Gas)
- Iraq: Baghdad, Basra (Key for Oil & Gas, Water)
- Japan: Tokyo, Osaka, Nagoya (Primary for Petrochemical, Power Generation, Shipbuilding)
- Jordan: Amman, Irbid
- Kazakhstan: Nur-Sultan, Almaty (Key for Oil & Gas)
- Kuwait: Kuwait City, Ahmadi (Key for Oil & Gas, Water)
- Laos: Vientiane, Luang Prabang
- Lebanon: Beirut, Tripoli
- Malaysia: Kuala Lumpur, Johor Bahru, Port Klang (Key for Oil & Gas, Petrochemical, Water)
- Myanmar: Yangon, Mandalay
- Nepal: Kathmandu, Biratnagar
- Oman: Muscat, Sohar, Salalah (Key for Oil & Gas, Water)
- Philippines: Manila, Cebu
- Qatar: Doha, Ras Laffan (Key for Oil & Gas, Water)
- Saudi Arabia: Riyadh, Jeddah, Dammam, Al Khobar, Jubail (Primary for Oil & Gas, Petrochemical, Water & Desalination)
- Singapore: Singapore City (Key for Marine, Oil & Gas Logistics, Petrochemical Hub)
- South Korea: Seoul, Busan, Ulsan (Primary for Shipbuilding, Petrochemical, Power)
- Sri Lanka: Colombo, Kandy
- Syria: Damascus, Aleppo
- Taiwan: Taipei, Kaohsiung (Key for Petrochemical, Power, Water)
- Thailand: Bangkok, Rayong, Laem Chabang (Key for Petrochemical, Water)
- UAE: Dubai, Abu Dhabi, Sharjah, Ajman, Ras Al Khaimah (Primary for Oil & Gas, Petrochemical, Water & Desalination)
- Uzbekistan: Tashkent, Samarkand
- Vietnam: Ho Chi Minh City, Hanoi, Da Nang (Key for Oil & Gas, Water)
- Yemen: Sana'a, Aden
- Canada: Calgary, Edmonton, Vancouver, Toronto, Montreal (Key for Oil & Gas, Power Generation, Water Infrastructure)
- Mexico: Mexico City, Monterrey, Guadalajara (Key for Oil & Gas, Petrochemical, Water)
- Panama: Panama City, Colón
- USA: Houston, Los Angeles, New York, Chicago, New Orleans (Primary Market for Oil & Gas, Petrochemical, Power Generation, Water & Infrastructure)
- Argentina: Buenos Aires, Cordoba (Key for Oil & Gas, Water)
- Bolivia: La Paz, Santa Cruz (Key for Oil & Gas)
- Brazil: São Paulo, Rio de Janeiro, Salvador (Key for Oil & Gas, Petrochemical, Power, Water)
- Chile: Santiago, Valparaíso (Key for Mining, Oil & Gas, Water)
- Colombia: Bogota, Medellin (Key for Oil & Gas, Water)
- Ecuador: Quito, Guayaquil (Key for Oil & Gas)
- Peru: Lima, Arequipa (Key for Mining, Oil & Gas, Water)
- Uruguay: Montevideo
- Venezuela: Caracas, Maracaibo (Key for Oil & Gas)
- Algeria: Algiers, Oran (Key for Oil & Gas, Water)
- Angola: Luanda, Huambo (Key for Oil & Gas)
- Egypt: Cairo, Alexandria, Port Said (Key for Oil & Gas, Petrochemical, Water & Desalination)
- Ghana: Accra, Kumasi
- Kenya: Nairobi, Mombasa
- Libya: Tripoli, Benghazi (Key for Oil & Gas)
- Morocco: Casablanca, Rabat (Key for Water & Desalination)
- Mozambique: Maputo, Beira (Key for Oil & Gas)
- Nigeria: Lagos, Port Harcourt, Abuja (Primary for Oil & Gas, Power, Water)
- Rwanda: Kigali, Rubavu
- South Africa: Johannesburg, Durban, Cape Town, Sasolburg (Key for Mining, Petrochemical, Power, Water)
- Tanzania: Dar es Salaam, Mwanza
- Tunisia: Tunis, Sfax (Key for Water & Desalination)
- Uganda: Kampala, Gulu
- Australia: Sydney, Melbourne, Perth, Brisbane (Key for Mining, Oil & Gas, Water & Energy Projects)
- Fiji: Suva, Nadi
- New Zealand: Auckland, Wellington, Christchurch
- Papua New Guinea: Port Moresby, Lae (Key for Mining, Oil & Gas)
Why Choose Dipti Metal Industries for Your ASTM A671 / A672 EFW Pipes?
- Leading Global Manufacturer & EFW Pipe Expertise: As a premier manufacturer, supplier, and worldwide exporter from Mumbai, we specialize in high-quality ASTM A671 / A672 Electric Fusion Welded (EFW) Steel Pipes. We offer deep expertise in producing large-diameter, plate-based pipes for reliable fluid transfer across diverse industrial applications globally, from atmospheric to lower temperatures (A671) and high-pressure moderate temperatures (A672).
- Uncompromising Quality & Comprehensive Certifications: Our EFW pipes are manufactured under strict ISO 9001 certified processes and comply with stringent international standards including ASTM A671/A672, ASME SA671/SA672, ASME B36.10M, PED 2014/68/EU, and IBR. We provide full heat traceability for both the parent plate and weld metal, along with comprehensive EN 10204 Type 3.1 or 3.2 Material Test Certificates (MTCs), guaranteeing superior functional integrity and absolute compliance for critical applications.
- Plate-Based Fabrication with Extensive Grade & Class Options: We leverage pressure-vessel quality plates (e.g., ASTM A516, A537, A203) to fabricate EFW pipes across a wide range of pipe grades (e.g., CC60, CD70, CFA65, CG100). Our pipes are available in various Classes (10–73), allowing for precise selection of heat treatment (Stress Relieved, Normalized, Quenched & Tempered) and non-destructive examination (NDE) including full radiography (RT) or ultrasonic testing (UT) as per project requirements.
- Rigorous Testing & Enhanced Protection: Beyond mandatory hydrostatic testing, we offer extensive NDE options (RT, UT, MT, PT) for weld integrity, as well as mechanical property tests derived from the plate specifications. Optional HIC/SSC testing per NACE MR0175/ISO 15156 is available for sour service. We provide various external coatings (3LPE, 3LPP, FBE, HDG) and internal linings (epoxy), along with robust seaworthy packing, ensuring long-term asset integrity and safe global transit.
- Customization & Expert Technical Support: We offer significant customization for Outer Diameter (typically 16”+), Wall Thickness (Sch 5 to XXS), and lengths (up to 18 meters). Our experienced technical team provides expert consultation on material grade selection, class requirements, welding procedures, coating systems, and compliance requirements (including NACE and PED), ensuring you receive the optimal EFW pipe solution that perfectly balances performance, durability, and cost-effectiveness.
- Global Export & Efficient Logistics: As a dedicated worldwide exporter, Dipti Metal Industries guarantees efficient and reliable global delivery for ASTM A671 / A672 EFW Pipes. We ensure secure, robust packaging, comprehensive documentation, and streamlined customs clearance, facilitating timely project completion across all continents, supporting critical oil & gas, power generation, petrochemical, and large infrastructure projects globally.
- Competitive Pricing & Superior Value: Leveraging our optimized manufacturing processes, strategic sourcing of high-quality pressure vessel plates, and specialized production capabilities, we consistently deliver high-quality ASTM A671 / A672 EFW Pipes at competitive pricing. Our products offer superior long-term value through enhanced safety, absolute system integrity, and improved overall project cost-effectiveness for large-diameter and demanding industrial applications.
Get a Quote Today for Your ASTM A671 / A672 EFW Pipes Requirements!
Are you in search of reliable, high-quality ASTM A671 / A672 Electric Fusion Welded (EFW) Steel Pipes for atmospheric & lower temperatures or high-pressure moderate temperature service in your oil & gas, power generation, petrochemical, water, or shipbuilding projects? Contact Dipti Metal Industries, your expert leading global manufacturer, stockist, supplier, dealer, distributor, and worldwide exporter of ASTM A671 / A672 EFW Pipes from Mumbai, India, today. Our dedicated team is ready to discuss your specific pipe grade (e.g., CC65), pipe class (e.g., 22), OD & WT or Schedule (e.g., 24" Sch 40), length, end finish, heat treatment requirements, NDE extent (e.g., full RT), coatings/linings, test scope, and any applicable stringent standards (ASTM A671/A672, ASME B36.10M, EN 10204 3.1/3.2, IBR, NACE, PED). Request a personalized, custom quote to secure the most effective and dependable EFW pipe solutions that guarantee unparalleled operational integrity and prolonged system life in demanding industrial environments.
Price guidance (non-binding): Starting from USD 1120.00 per metric ton, depending on pipe grade, class, OD, WT, length, heat treatment, NDE, coatings/linings, and required stringent certifications. Final prices are quotation-based.
ASTM A671 / A672 EFW Pipes — Frequently Asked Questions
ASTM A671 and A672 Electric Fusion Welded (EFW) pipes are large-diameter steel pipes primarily fabricated from pressure-vessel quality plates. These plates are rolled into cylindrical shapes and welded longitudinally using an electric fusion welding process. ASTM A671 pipes are intended for atmospheric and lower-temperature service, while ASTM A672 pipes are specified for high-pressure service at moderate temperatures. Both standards allow for a wide range of plate materials, heat treatments, and quality classes, making them highly versatile for demanding applications in industries like oil & gas, power generation, petrochemicals, and water infrastructure. Dipti Metal Industries manufactures and supplies these pipes, ensuring high integrity and full compliance with international standards.
The key benefits of using ASTM A671 / A672 Electric Fusion Welded Pipes from Dipti Metal Industries include:
- High Customization: Fabricated from plates, allowing for precise control over OD, WT, and length to meet exact project specifications, especially for large diameters.
- Pressure Vessel Quality: Made from certified pressure vessel plates, ensuring superior material integrity and performance in pressure containment applications.
- Versatile Temperature Service: A671 caters to atmospheric and lower temperatures, while A672 serves high-pressure applications at moderate temperatures.
- Defined Quality Classes: Available in various "Classes" (10–73) that specify required heat treatment, radiography (RT), and hydrostatic testing, providing clear quality benchmarks.
- Robust Weld Integrity: The EFW process combined with extensive NDE and heat treatment options ensures a strong, reliable weld seam.
- Cost-Effective for Large Diameters: Offers an economical alternative to seamless pipes for large-bore applications, without compromising on performance or safety.
- Full Traceability & Certification: Supplied with comprehensive EN 10204 3.1/3.2 MTCs, detailing plate and weld metal traceability and full test results.
For ASTM A671 and A672 pipes, the grade is derived from the specific pressure vessel quality plate material used for its fabrication. For example, a "CC65" pipe grade indicates it was made from an ASTM A516 Grade 65 plate. This allows for a wide selection of carbon, carbon-manganese, alloy, and nickel steels, each offering distinct chemical and mechanical properties suitable for different service conditions. The "Class" designation (e.g., Class 22, Class 32) defines additional requirements:
- Heat Treatment: Specifies if the pipe is stress relieved, normalized, quenched and tempered, or has no post-weld heat treatment.
- Radiography (RT): Determines the extent of radiographic examination on the weld seam (e.g., full-length, spot, or none).
- Pressure Test: Indicates if a hydrostatic test is mandatory.
ASTM A671 and A672 Electric Fusion Welded Pipes are widely used in large-scale industrial and infrastructure projects:
- Oil & Gas Industry: For main transmission pipelines (crude oil, natural gas, refined products), storage tank connections, and process piping in refineries and gas processing plants.
- Power Generation: In cooling water circuits, steam lines (A672), boiler auxiliary systems, and large-diameter intake/discharge lines for thermal and nuclear power plants.
- Water & Desalination Plants: For municipal water supply lines, large-diameter raw water intake, treated water distribution, and brine discharge lines in desalination facilities.
- Petrochemical & Chemical Industry: Used in large process piping for transferring various chemicals and hydrocarbons within plants.
- Shipbuilding & Marine: For large-bore piping systems in marine vessels, offshore platforms, and port infrastructure.
- General Industrial & Infrastructure: Any application requiring robust, large-diameter piping for fluid transfer, often where cost-effectiveness for larger sizes is a key consideration.
Dipti Metal Industries ensures stringent quality control and comprehensive documentation for all ASTM A671 / A672 EFW pipes:
- Material Test Certificates (MTCs): Provided as per EN 10204 Type 3.1 or 3.2, ensuring full heat traceability for both the parent plate and weld metal, chemical analysis, mechanical test results, and NDE reports.
- Hydrostatic Testing: All pipes undergo hydrostatic testing (as specified by class) to verify leak tightness and pressure integrity per ASTM A530/A530M.
- Non-Destructive Examination (NDE): Includes radiography (RT) for the weld seam (extent defined by pipe class, e.g., full-length), Ultrasonic Testing (UT), Magnetic Particle Testing (MT), and Liquid Penetrant Testing (PT) as applicable. Plate UT is also performed as required.
- Mechanical Testing: Includes tensile tests, bend tests, flattening/expansion tests, and Charpy V-notch (CVN) impact tests (if specified by the plate material or application).
- Compliance Certifications: Pipes are supplied with compliance to ISO 9001:2015, PED 2014/68/EU (Pressure Equipment Directive for European markets), and IBR (Indian Boiler Regulations) where specified. NACE MR0175/ISO 15156 compliance is available for sour service.
What Our Customers Say About Our ASTM A671 / A672 EFW Pipes
“Dipti Metal's ASTM A671 EFW pipes are critical for our large-diameter water and auxiliary lines in various projects. Their ability to deliver specific classes with comprehensive NDE, including full RT, ensures the robust integrity required. Excellent service and compliance.”
— Oil & Gas Pipeline Project Engineer – Piping Materials Lead, BP plc, London, UK
“We rely on Dipti Metal for ASTM A672 pipes for our medium-temperature, high-pressure steam and cooling water systems. The quality derived from pressure vessel plates is evident, and their detailed heat treatment documentation is invaluable. Consistently meets our stringent specs.”
— Power Plant Construction Manager – Lead Procurement Specialist, GE Power, Schenectady, USA
“For large-diameter water intake and discharge lines in our desalination plants, Dipti Metal's ASTM A671 pipes are a cost-effective and reliable solution. Their ability to apply internal epoxy coatings is a significant advantage for corrosion control. Fast global delivery is a key benefit.”
— Desalination Plant Engineer – Piping Systems Integrator, ACWA Power, Riyadh, Saudi Arabia
“Dipti Metal supplies specialized ASTM A671/A672 EFW pipes for various marine applications, including cargo and ballast lines. The flexibility in grade and class selection, combined with rigorous testing, makes them a preferred vendor for our shipbuilding needs.”
— Shipbuilding Materials Manager – Purchasing Director, Hyundai Heavy Industries, Ulsan, South Korea
“For large-scale infrastructure and industrial projects requiring high-quality EFW pipes, Dipti Metal Industries consistently meets our exacting standards. Their comprehensive documentation, adherence to ASTM/ASME codes, and competitive pricing make them an invaluable partner in our global supply chain.”
— Global EPC Engineering Director – Chief Mechanical Engineer, McDermott International, Houston, USA
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