DIPTI METAL INDUSTRIES
ASTM A234 WP91 Alloy Steel Butt Weld Pipe Fittings – Global Manufacturer, Exporter & Supplier
Dipti Metal Industries is a leading Manufacturer, Stockist, Exporter & Supplier of ASTM A234 WP91 Alloy Steel Butt Weld Pipe Fittings. Based in Mumbai (India), we support refineries, petrochemicals, power/boiler, and EPC projects with certified quality and reliable deliveries. Our WP91 fittings are supplied with EN 10204 3.1 / 3.2 Mill Test Certificates, optional third-party inspections (BV/TUV/LR/SGS), and compliance with IBR • PED • CE • Mill Approvals.
ASTM A234 WP91 Elbows, Tees, Reducers, Caps, Stub Ends, Crosses & Bends are available in Seamless sizes 1/2″–24″ • Welded sizes 1/2″–60″ • Schedules 10–XXS • Conforming to ASME B16.9/B16.28 • Bevel Ends per B16.25.
Product Overview — ASTM A234 WP91 Alloy Steel Butt Weld Pipe Fittings
ASTM A234 WP91 (9Cr-1Mo-V-Nb, P91 family) is a creep-strength-enhanced ferritic alloy steel for high-temperature service. We manufacture elbows, tees, reducers, caps, stub ends, crosses, laterals and bends conforming to ASME B16.9/B16.28, with bevel ends per ASME B16.25.
UNS K91560 | X10CrMoVNb9-1 | EN 1.4903 | ASME B16.9 / B16.28 / B16.25
Types of ASTM A234 WP91 Butt Weld Pipe Fittings
- ASTM A234 WP91 Elbows (LR/SR 90°, 45°, 180° returns)
- ASTM A234 WP91 Tees (equal & reducing), Crosses
- ASTM A234 WP91 Reducers (concentric & eccentric)
- ASTM A234 WP91 Caps, Stub Ends (short/long), Laterals
- Specials: fabricated offsets, headers, spools
Mechanical & Chemical Properties — ASTM A234 WP91
Mechanical Properties (Typical/Min. Guidance) — ASTM A234 WP91
| Property | Value |
|---|---|
| Yield Strength (min) | ≥ 275 MPa |
| Tensile Strength | 585–760 MPa |
| Elongation (min) | ≥ 20% |
| Hardness (HB) | ≤ 250 HB |
Chemical Composition (Typical / %) — ASTM A234 WP91
| Element | Percentage Range (%) |
|---|---|
| Carbon (C) | 0.08–0.12 |
| Manganese (Mn) | 0.30–0.60 |
| Silicon (Si) | 0.20–0.50 |
| Phosphorus (P) | ≤ 0.020 |
| Sulfur (S) | ≤ 0.010 |
| Chromium (Cr) | 8.0–9.5 |
| Molybdenum (Mo) | 0.85–1.05 |
| Vanadium (V) | 0.18–0.25 |
| Niobium (Nb) | 0.06–0.10 |
| Nitrogen (N) | 0.03–0.07 |
Note: Values are indicative; final acceptance per current ASTM/ASME and purchase specifications. Heat treatment/PWHT per WP91 requirements.
Quick Specifications — ASTM A234 WP91
- Seamless: NPS 1/2″ – 24″
- Welded: NPS 1/2″ – 60″
- Schedules: Sch 10/20/40/60/80/120/160, XS/XXS
- ASME B16.9 / B16.28
- Bevel ends per ASME B16.25
- EN 10253-2 (on request), MSS SP-43/75/97
- MTC EN 10204 3.1 (3.2 on request)
- NDT: UT/MT/PT • PMI • HIC/SSC (on request)
- IBR • PED • CE • Mill Approvals
Also available in other ASTM A234 grades on request: WP5, WPC, WP11, WP12, WP22. Origins: Indian / European / Japanese / Korean mills.
Supply Range & Options — ASTM A234 WP91
- NPS 1/2″ to 60″ (NB) — Seamless up to 24″, Welded up to 60″
- Sch 10/20/40/60/80/120/160, XS/XXS
- Wall per ASME/ASTM tables or custom
- Bevel ends per ASME B16.25; Plain ends on request
- Fabricated fittings & spools; pickling, shot-blasting, painting
- Coatings per PO/spec
- MTC EN 10204 3.1; Heat no. traceability
- NDT (UT/MT/PT), PMI on request; HIC/SSC per project
- Third-party inspection: BV, TUV, LR, SGS
Applications — ASTM A234 WP91 Alloy Steel Butt Weld Pipe Fittings
ASTM A234 WP91 fittings are designed for highly demanding applications requiring excellent creep resistance and strength at elevated temperatures, often exceeding those suitable for standard carbon steel or lower alloy steels. Key sectors and uses include:
- Power generation plants (superheaters, reheaters, main steam lines)
- Boiler piping systems
- Refineries & petrochemicals (high-temperature sections, heaters)
- Chemical processing plants with high-temperature reactors
- Waste-to-energy facilities
- Heat exchangers and components under creep conditions
- Steam piping for ultra-supercritical power plants
- High-pressure, high-temperature industrial installations
Global Export Network: Worldwide Distributor & Exporter of ASTM A234 WP91 Fittings
DIPTI METAL INDUSTRIES is a proud Worldwide Exporter, Global Supplier, Leading Dealer, and Major Stockist of ASTM A234 WP91 Alloy Steel Butt Weld Pipe Fittings, with an extensive network that extends to over 190 countries worldwide. We ensure timely and compliant delivery of our premium butt weld fittings to major industrial hubs and critical infrastructure projects across the globe, with a strong focus on power generation, petrochemical, chemical processing, and refinery sectors worldwide, solidifying our position as a top international trading partner for these specialized high-temperature and creep-resistant piping solutions. The countries and cities listed below highlight our established key markets and are illustrative of our truly global reach for all our fittings.
Explore Our Extensive Global Reach (Illustrative Markets)
We are Manufacturer, Suppliers, Distributor, Stockholder, Wholesaler, Dealer, Stockist, Exporter, Importer in UAE, Saudi Arabia, Qatar, Oman, Bahrain, Kuwait, Iraq.
- WP91 Elbows UAE: Abu Dhabi, Dubai, Sharjah, Jebel Ali, Ajman, Ras Al Khaimah, Fujairah
- WP91 Tees Saudi Arabia: Riyadh, Dammam, Al Khobar, Jubail, Jeddah, Yanbu
- WP91 Reducers Qatar: Doha, Ras Laffan, Mesaieed
- WP91 Caps Oman: Muscat, Sohar, Duqm, Salalah
- WP91 Butt Welds Bahrain: Manama, Sitra
- WP91 Alloy Steel Fittings Kuwait: Kuwait City, Ahmadi, Shuaiba
- WP91 High-Temp Fittings Iraq: Basra, Baghdad, Erbil
We are Manufacturer, Suppliers, Distributor, Stockholder, Wholesaler, Dealer, Stockist, Exporter, Importer in India, Singapore, Malaysia, Thailand, Vietnam, Indonesia, China, Japan, South Korea, Taiwan, Bangladesh, Sri Lanka, Philippines, Kazakhstan, Uzbekistan, Myanmar, Cambodia, Laos, Mongolia, Afghanistan, Bhutan, Brunei, East Timor, Kyrgyzstan, Maldives, Nepal, North Korea, Tajikistan, Turkmenistan.
- WP91 Elbows India: Mumbai, Hazira, Jamnagar, Dahej, Mundra, Chennai, Visakhapatnam, Kolkata, Paradip
- WP91 Tees Singapore: Jurong, Tuas
- WP91 Reducers Malaysia: Port Klang, Johor, Bintulu, Kuching, Labuan
- WP91 Caps Thailand: Bangkok, Laem Chabang, Map Ta Phut
- WP91 Stub Ends Vietnam: Ho Chi Minh City, Hai Phong, Da Nang
- WP91 Crosses Indonesia: Jakarta, Surabaya, Batam, Balikpapan
- WP91 Fittings China: Shanghai, Ningbo, Tianjin, Qingdao, Shenzhen, Guangzhou
- WP91 Pipe Fittings Japan: Tokyo, Yokohama, Osaka, Nagoya
- WP91 Alloy Steel South Korea: Busan, Incheon, Ulsan
- WP91 Butt Welds Taiwan: Kaohsiung, Taipei, Taichung
- WP91 High-Temp Bangladesh: Chittagong, Dhaka, Mongla
- WP91 Creep Resistant Sri Lanka: Colombo, Hambantota
- WP91 Fittings Philippines: Manila, Cebu, Subic Bay
We are Manufacturer, Suppliers, Distributor, Stockholder, Wholesaler, Dealer, Stockist, Exporter, Importer in United Kingdom, Germany, France, Italy, Spain, Netherlands, Belgium, Switzerland, Sweden, Norway, Denmark, Finland, Austria, Ireland, Poland, Czech Republic, Portugal, Greece, Turkey, Russia, Ukraine, Romania, Hungary, Bulgaria, Serbia, Croatia, Slovakia, Slovenia, Lithuania, Latvia, Estonia, Belarus, Moldova, Luxembourg, Cyprus, Malta, Iceland, Albania, Andorra, Armenia, Azerbaijan, Bosnia and Herzegovina, Georgia, Kosovo, Liechtenstein, Monaco, Montenegro, North Macedonia, San Marino, Vatican City.
- WP91 Elbows UK: London, Aberdeen, Teesside, Southampton
- WP91 Tees Germany: Hamburg, Bremen, Duisburg, Frankfurt
- WP91 Reducers France: Marseille, Le Havre, Paris, Dunkirk
- WP91 Caps Italy: Genoa, Trieste, Taranto, Milan
- WP91 Butt Welds Spain: Barcelona, Valencia, Bilbao, Madrid
- WP91 Alloy Steel Netherlands: Rotterdam, Amsterdam
- WP91 High-Temp Belgium: Antwerp, Ghent
- WP91 Creep Resistant Poland: Gdańsk, Gdynia, Warsaw
We are Manufacturer, Suppliers, Distributor, Stockholder, Wholesaler, Dealer, Stockist, Exporter, Importer in United States, Canada, Mexico.
- WP91 Elbows USA: Houston, New Orleans, Los Angeles, Newark, Charleston, Seattle
- WP91 Tees Canada: Toronto, Montreal, Vancouver, Calgary, Edmonton
- WP91 Reducers Mexico: Veracruz, Altamira, Manzanillo, Monterrey
We are Manufacturer, Suppliers, Distributor, Stockholder, Wholesaler, Dealer, Stockist, Exporter, Importer in Brazil, Argentina, Chile, Peru, Colombia, Venezuela, Ecuador, Bolivia, Uruguay, Paraguay, Guyana, Suriname, French Guiana.
- WP91 Elbows Brazil: Santos, Rio de Janeiro, Vitória, São Paulo
- WP91 Tees Argentina: Buenos Aires, Rosario, Bahía Blanca
- WP91 Reducers Chile: Valparaíso, San Antonio
- WP91 Caps Peru: Callao, Lima
- WP91 Butt Welds Colombia: Cartagena, Barranquilla
We are Manufacturer, Suppliers, Distributor, Stockholder, Wholesaler, Dealer, Stockist, Exporter, Importer in South Africa, Nigeria, Egypt, Kenya, Morocco, Ghana, Angola, Tanzania, Uganda, Mozambique, Zambia, Ethiopia, Sudan, Ivory Coast, Cameroon, Senegal, Gabon, Republic of Congo, Democratic Republic of Congo, Zimbabwe, Namibia, Botswana, Mauritius, Rwanda, Burundi, Chad, Niger, Mali, Burkina Faso, Benin, Togo, Sierra Leone, Liberia, Guinea, Mauritania, Somalia, Eritrea, Djibouti, Central African Republic.
- WP91 Elbows South Africa: Durban, Johannesburg, Cape Town, Richards Bay
- WP91 Tees Nigeria: Lagos, Port Harcourt, Warri
- WP91 Reducers Egypt: Alexandria, Cairo, Suez
- WP91 Caps Kenya: Mombasa, Nairobi
- WP91 Butt Welds Morocco: Casablanca, Tangier
- WP91 Alloy Steel Ghana: Tema, Takoradi, Accra
We are Manufacturer, Suppliers, Distributor, Stockholder, Wholesaler, Dealer, Stockist, Exporter, Importer in Australia, New Zealand, Papua New Guinea, Fiji, Solomon Islands, Vanuatu, Samoa, Tonga, Kiribati, Micronesia, Nauru, Palau, Tuvalu, Marshall Islands.
- WP91 Elbows Australia: Sydney, Melbourne, Brisbane, Perth, Adelaide
- WP91 Tees New Zealand: Auckland, Wellington, Christchurch
- WP91 Reducers Papua New Guinea: Port Moresby
Why Choose Dipti Metal Industries for Your ASTM A234 WP91 Alloy Steel Butt Weld Pipe Fittings?
- Global Authority & Expertise: Decades of experience and a proven track record as a leading international manufacturer, stockist, and exporter of ASTM A234 WP91 Alloy Steel Butt Weld Pipe Fittings for global high-temperature and creep-strength-enhanced service applications.
- Certified Excellence & Full Traceability: Adherence to ASTM, ASME (B16.9, B16.28), DIN, EN, BS, JIS, ISO, GOST standards for all WP91 fittings, with MTC EN 10204 3.1 (3.2 on request) and optional TPI by BV, TÜV, LR, SGS. We also provide compliance with IBR, PED, CE and Mill Approvals, ensuring strict quality assurance and full traceability.
- Immense Ready Stock & Rapid Global Delivery: Strategically maintained ready stock of a diverse range of ASTM A234 WP91 fittings (all types, sizes, and schedules) for expedited project timelines and urgent procurement worldwide.
- Tailored & Custom Solutions: Robust capability for custom OEM fabrication, special designs, and manufacturing of non-standard fittings (e.g., pipe spools, headers, special bends) based on client drawings and specifications.
- Dedicated Technical Support: Expert technical sales support for all WP91 fitting specifications, from initial inquiry (RFQ) and Bill of Quantity (BOQ) review to detailed engineering assistance and post-delivery follow-up.
- Superior Value Proposition: Competitive pricing without compromising on the premium quality and performance of our alloy steel fittings for long-term operational success in high-temperature and high-pressure environments where creep resistance is critical.
Get a Quote Today for Your ASTM A234 WP91 Pipe Fittings!
Secure the best price for your ASTM A234 WP91 Alloy Steel Butt Weld Pipe Fittings. Easily request MTC / QA Docs, submit your BOQ / Drawings, or inquire about lead times. Our expert team is ready to provide prompt, professional assistance. Partner with Dipti Metal Industries – Your trusted global supplier, top manufacturer, and leading exporter for superior alloy steel pipe fittings. Experience the Dipti® difference in quality, reliability, and comprehensive solutions.
Price guidance (non-binding): Pricing varies significantly by fitting type, size, schedule, quantity, and specific certifications. Final prices are quotation-based.
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Global export expertise: Seaworthy export packing • Line-wise bagging & tagging • Full documentation & TPI. We are a worldwide exporter of quality ASTM A234 WP91 fittings.