What is ASTM A234 WPB?
ASTM A234 is the Standard Specification for steel pipe fittings. It includes materials made of carbon steel
and alloy steel for use at both moderate and high temperatures. It has to do with both seamless and welded
steel fittings. Steel pipe fittings are used in pipelines that carry high pressure and in the making of
pressure vessels. These fittings are made from killed steel, forgings, bars, plates, seamless or HFW
(fusion-welded) pipe products, and filler metal.
ASTM A234 covers seamless and welded carbon steel and alloy steel fittings covered by the latest revisions of
ASTM B16.9, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, and MSS-SP-97.
SA 234 steel pipe fittings are used in pressure piping and the making of pressure vessels for services at both
moderate and high temperatures. In this standard, the materials for fittings are killed steel, forgings, bars,
plates, and seamless or fusion-welded tubular products with filler metal.
In this standard, the specifications for elbows, tees, reducers, caps, and crosses are laid out. The ends of
these parts usually have butt welds.
Grades in ASTM A234
There are many grades in the ASTM A234 standard, like WPB, WPC, WP5, WP9, WP11, WP12, WP22, WP91, and so on.
Grade WPB is the most common material for medium and high temperature pipelines in these standards. W stands for
"weldable," P for "pressure," B for "grade b," and Y for "yield strength."
SA 234 WPB steel pipe fittings may be made from raw materials like ASTM A106 Gr.B and C steel pipe. Also from
steel plates, like ASTM A285 Gr.C, ASTM A516 Gr.70, ASTM A572, etc.
What is Steel pipe fittings
Steel pipe fittings are made of carbon or alloy steel pipe, plates, or profiles that have been shaped into a
certain shape that can be used in pipeline systems to change the flow direction or rate of fluids. Most of these
fittings are made of steel and include 45-degree or 90-degree elbows, tees, reducers (concentric or eccentric),
crosses, caps, nipples, flanges, gaskets, studs, and so on.
For industrial purposes, we usually need to change the direction of flow in pipeline systems, change the flow
rate of fluids (oil and gas, water, slurry), open or close the pipelines, etc. So, steel pipe fittings will be
used to finish these tasks.
| Specification | ASTM A234 / ASME SA234 |
| Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43 |
| Size | 1/2" NB to 24″NB in. |
| Type | Seamless / Welded / Fabricated |
| Thickness | Sch 5s, Sch 10s, Sch 40s, Sch 80s, Sch 160s, Sch XXS |
| Surface Treatment | Rust-proof black oil or hot galvanized, Transparent oil |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom |
| Types | ASTM A234 WPB (LR) Long Radius Elbow, ASTM A234 WPB (SR) Short Radius Elbow, ASTM A234 WPB 2D Elbow, ASTM A234 WPB 3D Elbow, ASTM A234 WPB 5D Elbow, ASTM A234 WPB 10D Elbow, ASTM A234 WPB Equal Cross, ASTM A234 WPB Unequal Crosses, ASTM A234 WPB Reducing Nipple, ASTM A234 WPB Butt Tee Fittings, ASTM A234 WPB Bend, ASTM A234 WPB Swedge Nipple, ASTM A234 Pipe Nipple, ASTM A234 WPB Reducers, ASTM A234 WPB Caps, ASTM A234 WPB Stub End, ASTM A234 WPB Pipe / Piggable Bend, ASTM A234 WPB Pipe Elbow |
ASTM A234 WPB B16.9 / 16.25 / 16.49 steel pipe fittings
ASTM A234 90 degree long radius BW Elbows
astm a234 branch pipe fittings pipe lateral tee
WP22 WP9 concentric swage Thread nipple
Carbon steel pipe fittings eccentric reducer
ASME SA234 ANSI B16.9 72x72x60INCH TEE
| Grade and Marking Symbol | Composition, % | ||||||
| C | Mn | P | S | Si | Cr | Mo | |
| WPB | 0.30 max | 0.29-1.06 | 0.050 | 0.058 | 0.10 min | 0.40 max | 0.15 max |
| WPC | 0.35 max | 0.29-1.06 | 0.050 | 0.058 | 0.10 min | 0.40 max | 0.15 max |
| WP1 | 0.28 max | 0.30-0.90 | 0.045 | 0.045 | 0.10-0.50 | … | 0.44-0.65 |
| WP12 CL1, WP12 CL2 | 0.05-0.20 | 0.30-0.80 | 0.045 | 0.045 | 0.60 max | 0.80-1.25 | 0.44-0.65 |
| WP11 CL1, | 0.05-0.15 | 0.30-0.60 | 0.030 | 0.030 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 |
| WP11 CL2, WP11 CL3 | 0.05-0.20 | 0.30-0.80 | 0.040 | 0.040 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 |
| WP22 CL1, WP22 CL3 | 0.05-0.15 | 0.30-0.60 | 0.040 | 0.040 | 0.50 max | 1.90-2.60 | 0.87-1.13 |
| WP5 CL1, WP5 CL3 | 0.15 max | 0.30-0.60 | 0.040 | 0.030 | 0.50 max | 4.0-6.0 | 0.44-0.65 |
| WP9 CL1, WP9 CL3 | 0.15 max | 0.30-0.60 | 0.030 | 0.030 | 1.00 max | 8.0-10.0 | 0.90-1.10 |
| WPR | 0.20 max | 0.40-1.06 | 0.045 | 0.050 | … | … | … |
| WP91 | 0.08-0.12 | 0.30-0.60 | 0.020 | 0.010 | 0.20-0.50 | 8.0-9.5 | 0.85-1.05 |
| WP911 | 0.09-0.13 | 0.30-0.60 | 0.020 | 0.010 | 0.10-0.50 | 8.5-9.5 | 0.90-1.10 |
| WPB | WPC, WP11-CL2 |
WP11-CL1,
WP22-CL1, WP5-CL1, WP9-CL1, |
WP11-CL3,
WP22-CL3, WP5-CL3, WP9-CL3 |
WP91 | |
|---|---|---|---|---|---|
| Tensile strength, minimum unless a range is given ksi (MPa) |
60 (415) | 70 (485) | 60 (415) | 75 (520) | 90 (620) |
| Yield,strength, min ksi (MPa) (0.2% offset or 0.5% extension under-load) |
35 (240) | 40 (275) | 30 (205) | 45 (310) | 60 (415) |
| WPB, WPC, WP11, WP22 |
WP91 | |||
|---|---|---|---|---|
| Longitundinal | Transverse | Longitundinal | Transverse | |
| Standard round specimen, or small proportioanl specimen, min % in 4 D |
22 | 14 | 20 | 13 |
| Rectangular speicmen for wall thickness 5/16″ and over, and for all small sizes tested in full section; min % in 2 in. |
30 | 20 A | ||
| Rectangular speicimen for wall thickness less than 5/16″; min % in 2 in (1/2″ wide specimen) |
B | B | ||
| Pipe | Fittings | Flanges | Valves | Bolts & Nuts |
|---|---|---|---|---|
| A106 Gr A | A234 Gr WPA | A105 | A216 Gr WCB | A193 Gr B7 A194 Gr 2H |
| A106 Gr B | A234 Gr WPB | A105 | A216 Gr WCB | |
| A106 Gr C | A234 Gr WPC | A105 | A216 Gr WCB |
| Product range and theoretical weights (kg) | |||||||||
| DN | Schedule 10S | Schedule 40S | Schedule 80S | ||||||
| 900 Elbow | 450 Elbow | Equal tee | 900 Elbow | 450 Elbow | Equal tee | 900 Elbow | 450 Elbow | Equal tee | |
| 8 | 0.02 | 0.01 | 0.03 | 0.03 | 0.02 | 0.06 | 0.04 | 0.03 | 0.07 |
| 10 | 0.03 | 0.02 | 0.05 | 0.03 | 0.02 | 0.03 | 0.06 | 0.04 | 0.09 |
| 15 | 0.06 | 0.03 | 0.09 | 0.08 | 0.04 | 0.10 | 0.10 | 0.05 | 0.14 |
| 20 | 0.07 | 0.03 | 0.13 | 0.08 | 0.04 | 0.17 | 0.11 | 0.05 | 0.20 |
| 25 | 0.14 | 0.08 | 0.28 | 0.15 | 0.11 | 0.29 | 0.22 | 0.14 | 0.38 |
| 32 | 0.23 | 0.11 | 0.49 | 0.26 | 0.17 | 0.59 | 0.40 | 0.23 | 0.68 |
| 40 | 0.30 | 0.17 | 0.68 | 0.40 | 0.23 | 0.86 | 0.51 | 0.29 | 1.02 |
| 50 | 0.50 | 0.25 | 0.85 | 0.70 | 0.4 | 1.28 | 0.91 | 0.59 | 1.59 |
| 65 | 0.85 | 0.48 | 1.41 | 1.40 | 0.77 | 2.19 | 1.81 | 0.99 | 3.13 |
| 80 | 1.25 | 0.63 | 1.77 | 2.20 | 1.08 | 3.31 | 2.97 | 1.50 | 4.45 |
| 90 | 1.70 | 0.75 | 2.67 | 2.83 | 1.42 | 4.08 | 4.00 | 2.00 | 5.44 |
| 100 | 2.10 | 1.08 | 3.46 | 4.47 | 2.09 | 5.27 | 6.18 | 2.81 | 7.71 |
| 150 | 5.45 | 2.72 | 8.07 | 10.89 | 5.44 | 10.99 | 16.32 | 8.16 | 13.61 |
| 200 | 10.20 | 5.33 | 15.65 | 21.54 | 10.77 | 20.91 | 33.11 | 16.56 | 28.12 |
| 250 | 18.15 | 9.75 | 26.46 | 38.56 | 19.27 | 35.38 | 51.71 | 25.86 | 49.90 |
| 300 | 25.80 | 13.62 | 39.46 | 59.42 | 29.71 | 62.14 | 79.38 | 39.69 | 83.91 |
| Tensile Requirements | WPB | WPC, WP11CL2 | WP11CL1 | WP11CL3 |
| Tensile Strength, min, ksi[MPa] | 60-85 | 70-95 | 60-85 | 75-100 |
| (0.2% offset or 0.5% extension-under-load) | [415-585] | [485-655] | [415-585] | [520-690] |
| Yield Strength, min, ksi[MPa] | 32 | 40 | 30 | 45 |
| [240] | [275] | [205] | [310] |
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