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WPB, WP1, WP12, and WP9 carbon steel fittings are manufactured from high-quality carbon and low-alloy steels, designed for high-pressure and high-temperature piping systems. These fittings are widely used in oil & gas, petrochemical, power generation, and industrial piping networks.
WPB: Standard carbon steel for moderate temperature and pressure.
WP1: Low-alloy steel with chromium-molybdenum for high-temperature service.
WP12: Low-alloy steel with higher chromium-molybdenum content for high-temperature and pressure applications.
| Standard | ASTM A234 |
| Grades | WPB WPC WP1 WP12 WP11 WP22 WP5 WP9 WPR WP91 |
| Form | Elbows 90°/45° |
| Surface Finish | Painted, black, or pickled and oiled |
| Outer Diameter | 1/2” – 48” OD (customizable) |
| Wall Thickness | As per schedule (SCH 10–160, STD, XS, XXS) |
| Connection | Butt-welded or socket-welded |
High strength and durability under pressure and temperature
Excellent performance in steam, water, and oil pipelines
Wide range of angles, sizes, and types for flexible piping design
Easy to fabricate, weld, and install
Long service life with reduced maintenance costs
Conforms to international standards for safety and reliability
| Grade | C | Mn | Si | P | S | Cr | Mo | Fe |
| WPB | 0.35 max | 1.06 | 0.60 | 0.035 max | 0.035 max | – | – | Balance |
| WP1 | 0.10–0.20 | 0.30–0.60 | 0.30–0.50 | 0.035 max | 0.035 max | 1.25 | 0.50 | Balance |
| WP12 | 0.10–0.20 | 0.30–0.60 | 0.30–0.50 | 0.035 max | 0.035 max | 1.25 | 0.50 | Balance |
| WP9 | 0.10–0.20 | 0.30–0.60 | 0.30–0.50 | 0.035 max | 0.035 max | 0.90 | 0.25 | Balance |
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
| WPB | 485–620 | ≥ 205 | ≥ 20 | 120–200 |
| WP1 | 415–550 | ≥ 205 | ≥ 20 | 120–200 |
| WP12 | 415–550 | ≥ 205 | ≥ 20 | 120–200 |
| WP9 | 415–550 | ≥ 205 | ≥ 20 | 120–200 |
ASTM A234 WPB
ASTM A234 WP1
ASTM A234 WP12
ASTM A234 WP9
Oil & Gas: High-pressure pipelines, steam, and hydrocarbon transport
Power Plants: Boiler and superheater piping, steam lines
Petrochemical & Chemical Plants: Process piping handling corrosive fluids
Water Treatment & Municipal Infrastructure: High-pressure water lines
Construction & Industrial: Structural and industrial piping projects
Marine & Offshore: High-temperature and high-pressure marine piping systems
Stainless Steel Fittings (304, 316, 316L): For high corrosion resistance
Alloy Steel Fittings (WP11, WP22, WP91, WP91H): For higher temperature and pressure
Duplex Stainless Steel: Higher strength and resistance to chloride-induced stress corrosion
Low-Alloy Carbon Steel (e.g., ASTM A860): For specific industrial or boiler applications
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
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Main Product:
Seamless Steel Tubes,
Welded Precision Steel Pipes,
Automotive Steel Tubes,
Carbon steel tubes,
Stainless Steel Tubes,
Special Shaped Steel Tubes
