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a234 wp5 wp11 wp12 wp22 wp91 a234 wp5 pipe fittings elbows

A234 WP91 is one of the steel grade in ASTM A234 standard.W means weldable,P means pressure,91 is grade 91.the starting material is ASTM A335 Gr P91 Seamless pipes,widely used for POWER PLANT FABRICATION,Chemical & Fertilizers, Power Generation and Nuclear Industries.

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⇒ASTM A234⇐ includes the latest editions of ASTM B16.9, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95 and wrought carbon and alloy steel fittings of seamless and welded construction covered by MSS- SP-97. and many more

Among these standards, WPB grade is the most commonly used material for medium and high temperature piping. W means weldable, P means pressure, and B is grade b, which refers to the minimum yield strength.

Source raw materials for ASTM A234 WPB steel pipe fittings may come from steel pipes such as ASTM A106 Gr.B and C. Also from steel plates like ASTM A285 Gr.C, ASTM A516 Gr 70, ASTM A572 etc.

Tensile Requirements
Grade and Marking Symbol WPB WPC, WP11 CL1, WP12 CL2 WP1 WP11 CL1, WP22 CL1, WP5 CL1, WP9 CL1 WPR WP11 CL3, WP22 CL3, WP2 CL3, WP9 CL3 WP91 WP911 WP12 CL1
Tensile strength, range Ksi [MPa] 60-95 70-95 [485-655] 55-80 [380-550] 60-85 63-88 [435-605] 75-100 [520-690] 85-110 [585-760] 90-120 [620-840] 60-85 [415-585]
[415-655] [415-585]
Yield strength, min, Ksi [MPa] (0.2% offset or 0.5% extension- under-load) 35 [240] 40 [275] 30 [205] 30 [205] 46 [315] 45 [310] 60 [415] 64 [440] 32 [220]
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