ASTM A234 WPB fittings means that the pipe fitting with carbon steel material and is designed for moderate to high-temperature service.
What is ASTM A234 Standard
ASTM A234 standard covers wrought carbon steel and alloy steel fittings of seamless and welded construction covered by the latest revision of ASME B16.9, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, and MSS-SP-97. These fittings are for use in pressure piping and in pressure vessel fabrication for service at moderate and elevated temperatures.
ASTM A234 is Standard Specification for steel pipe fittings includes carbon and alloy steel material for moderate and high temperature services. It covers steel fittings of seamless and welded types. The material grades are ASTM A234 WPB, WPC, WP5, WP9, WP91, WP11, WP12 and WP22 etc.
Carbon Steel Butt Weld Fittings Specification
| Types | Seamless and Welded Butt Weld Fittings |
| Size Range | 1/2″ – 80″ / DN15 – 2000 |
| Thickness Schedule | SCH 10, 20, 40, STD, XS, 80, 100, 120, 140, 160, XXS |
| Standard | ANSI / ASME B16.9, MSS SP 43, JIS B2311/2312/2313, EN10253 |
| Material | ASTM A234 WPB |
ASTM A234 WPB Fittings Properties
ASTM A234 WPB fittings are butt welding end and is to be welded with the steel pipes of API 5L Gr.B, A106 Gr.B, A53 Gr.B material. The regular items of WPB pipe fitting are cross, elbows, caps, reducers, and tees. ASTM A234 carbon steel pipe fittings may be made from seamless pipes, welded pipes or plates by shaping operations of pressing, piercing, extruding, bending, fusion welding, machining, or by a combination of two or more these operations.
Chemical Properties
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Cr | Mo | Ni | Cu | Cb | V |
| ASTM A234 WPB | MIN | 0.29 | 0.10 | |||||||||
| MAX | 0.30 | 1.06 | 0.050 | 0.058 | 0.40 | 0.15 | 0.40 | 0.40 | / | 0.08 |
Mechanical Properties
| MATERIAL | T.S (MPA) | Y.S (MPA) | EL % | R/A % |
| ASTM A234 WPB | 415 min | 240 min | 22 min | 30 min |
ASTM A234 WPB carbon steel butt weld fittings are medium carbon steel material with max 0.30 % carbon content with combination of 0.29–1.06 % manganese. These fittings are most commonly used for general purpose applications worldwide. ASTM A234 WPB fittings are ductile and strong Pipes with long wearing properties. These fittings are manufactured as per ASME specification and commercially referred as carbon steel pipe fittings.
ASTM A234 WPB Equivalent Material Grade
| Pipe | Fittings | Flanges | Valves | Bolts & Nuts |
| ASTM A106 Gr B | A234 Gr WPB | ASTM A105 | ASTM A216 Gr WCB | A193 Gr B7 A194 Gr 2H |
Types of Butt Weld Fittings
The regular items of Carbon steel butt weld fittings are elbows, tees, reducers and caps.
Butt weld fittings also can be divided into two categories to raw materials. Seamless butt weld fittings and welded butt weld fittings.
Seamless Butt Weld Fittings
Seamless butt weld fittings are characterized by their seamless construction, which means they are void of any welded seams or joints. As a result, they boast a high level of durability and are incredibly resistant to intense pressure and bending.
Welded Butt Weld Fittings
Welded butt weld fittings are generally made of welded pipes or steel plates, suitable for large-diameter pipeline systems, and have the advantages of low cost and durability.
Advantage of Carbon Steel Fittings
Strong and highly durable
Higher strength
Corrosion resistant properties
High and low-temperature resistant
Environmentally friendly and recyclable
Low maintenance and easily cleaned