ASTM A53 Grade A/B – ERW & Seamless Carbon Steel Pipes
Black & galvanized • Mechanical & pressure service • Fast global delivery • Best pricing
Introduction
Dipti Metal Industries is a leading manufacturer, stockist & exporter of ASTM A53 Grade A & Grade B carbon steel pipes in both ERW (Type E) and Seamless (Type S) construction, supplied in black or hot-dip galvanized finish. ASTM A53 is widely used for mechanical, pressure and ordinary uses—including oil & gas, fire-fighting, HVAC, water lines, air lines, steam, and structural applications.
Standard & Types
Standard: ASTM A53 / ASME SA53 (Grades A, B)
Types: S (Seamless), E (ERW), F (Furnace-butt welded)
Finishes: Black, Hot-dip Galvanized (HDG)
Dimensions: ASME B36.10M
Supply Range
Sizes: 1/2″ – 24″ NB
Schedules: 20, 30, 40 (STD), 60, 80 (XS), 120, 140, 160, XXS
Lengths: SRL, DRL, or custom cut
Ends: Plain (PE), Beveled (BE), Threaded (NPT)
Chemical Composition (Max/Min, %)
| Grade | C (max) | Mn (max) | P (max) | S (max) | Si | Notes |
|---|---|---|---|---|---|---|
| Grade A | 0.25–0.30 | ≤ 1.20 | ≤ 0.05 | ≤ 0.045 | — | Galvanized allowed |
| Grade B | ≤ 0.30 | ≤ 1.20 | ≤ 0.05 | ≤ 0.045 | — | Higher strength vs Grade A |
Confirm exact limits by type/finish at order stage. For high‑temperature service consider ASTM A106.
Mechanical Properties (Minimum)
| Grade | Tensile Strength | Yield Strength | Elongation |
|---|---|---|---|
| Grade A | 48,000 psi (330 MPa) | 30,000 psi (205 MPa) | Std. A53 formula |
| Grade B | 60,000 psi (415 MPa) | 35,000 psi (240 MPa) | Std. A53 formula |
Manufacturing, Tests & Certificates
Manufacturing
- Type S: Seamless (hot finished / cold drawn)
- Type E: Electric-Resistance Welded (ERW)
- Type F: Furnace-butt welded (on request)
- Finishes: Black (varnish) or Hot-dip Galvanized (HDG)
Tests & Documentation
- Hydrostatic test; NDE (Eddy/UT) as applicable
- Dimensional & visual inspection; marking & traceability
- EN 10204 3.1 / 3.2 MTC; Third‑party inspection on request
Dimensions & Weight (Sch 40 & 80)
| NPS | OD (mm) | Sch 40 WT (mm) | Sch 40 kg/m | Sch 80 WT (mm) | Sch 80 kg/m |
|---|---|---|---|---|---|
| 1/2″ | 21.3 | 2.77 | 1.27 | 3.73 | 1.62 |
| 3/4″ | 26.7 | 2.87 | 1.69 | 3.91 | 2.20 |
| 1″ | 33.4 | 3.38 | 2.50 | 4.55 | 3.24 |
| 1 1/4″ | 42.2 | 3.56 | 3.39 | 4.85 | 4.47 |
| 1 1/2″ | 48.3 | 3.68 | 4.05 | 5.08 | 5.41 |
| 2″ | 60.3 | 3.91 | 5.53 | 5.54 | 7.36 |
| 2 1/2″ | 73.0 | 5.16 | 8.63 | 7.01 | 11.41 |
| 3″ | 88.9 | 5.49 | 11.29 | 7.62 | 15.27 |
| 3 1/2″ | 101.6 | 5.74 | 13.57 | 8.08 | 18.63 |
| 4″ | 114.3 | 6.02 | 15.98 | 8.56 | 22.53 |
| 5″ | 141.3 | 6.55 | 21.76 | 9.53 | 32.74 |
| 6″ | 168.3 | 7.11 | 28.80 | 10.97 | 44.02 |
| 8″ | 219.1 | 8.18 | 44.15 | 12.70 | 72.69 |
| 10″ | 273.0 | 9.27 | 60.53 | 15.09 | 99.73 |
| 12″ | 323.9 | 10.31 | 78.32 | 17.48 | 129.77 |
| 14″ | 355.6 | 11.13 | 94.55 | 19.05 | 158.10 |
| 16″ | 406.4 | 12.70 | 123.30 | 21.44 | 203.53 |
| 18″ | 457.0 | 14.27 | 155.80 | 23.83 | 254.55 |
| 20″ | 508.0 | 15.09 | 183.42 | 26.19 | 311.17 |
| 24″ | 609.6 | 17.48 | 255.24 | 30.96 | 441.78 |
Weights are theoretical (ρ ≈ 7850 kg/m³); coating & tolerances may alter results.
Applications
- Oil & Gas lines • Water & Air lines • Fire-fighting & Sprinkler systems
- HVAC & Mechanical services • General pressure service
- Black steel pipe for welding & flanging • Galvanized for corrosion resistance
- Structural & fabrication uses (handrails, frames, supports)
Related / Comparable Grades
- ASTM A106 Grade A/B (seamless, high‑temperature service)
- API 5L Grade B (line pipe)
- EN 10255 / EN 10240 (welded/galvanized tubes, region‑dependent)
Selection between A53 vs A106 depends on operating temperature, code, and service conditions.
Export Destinations
Middle East & Africa
UAE, Saudi Arabia, Qatar, Oman, Bahrain, Kuwait, Iraq, Egypt, South Africa, Nigeria, Kenya, Morocco, Ethiopia, Ghana, Tanzania.
Asia & Oceania
Singapore, Malaysia, Indonesia, Vietnam, Thailand, Philippines, Japan, South Korea, China, Hong Kong, Taiwan, Bangladesh, Sri Lanka, Australia, New Zealand.
Europe
UK, Germany, France, Italy, Spain, Netherlands, Belgium, Switzerland, Poland, Turkey, Russia, Ukraine.
Americas
USA, Canada, Mexico, Brazil, Argentina, Chile, Peru, Colombia.
Frequently Asked Questions
What is ASTM A53 Grade B pipe?
ASTM A53 Grade B is a carbon steel pipe for mechanical and pressure applications, available as ERW (Type E) and Seamless (Type S). Supplied in black or hot‑dip galvanized finish.
Do you provide mill test certificates?
Yes. All supplies include EN 10204 3.1 MTC. We also arrange 3.2 certification and third‑party inspection on request.
What sizes and schedules are available?
We supply 1/2”–24” NB across Schedules 20–XXS (Sch 40/STD and Sch 80/XS common). Custom cut lengths and end finishes PE/BE/NPT are available.