ASTM A234 GR. WP11 Elbow,A234 WP11 Pipe Fittings,WP11 Tee,Reducer caps

ASTM A234 GR. WP11 Elbow,ASME B16.9 A234 WP11 Pipe Fittings,elbow,tee,reducer,caps

ASTM A234 WP11 pipe fittings are alloy steel butt weld fittings made from 1.25Cr–0.5Mo chromium-molybdenum steel, designed for high-temperature and high-pressure piping systems. Manufactured according to ASME B16.9, WP11 fittings such as elbows, tees, reducers, and caps provide excellent creep resistance, oxidation resistance, and long service life.

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What is ASTM A234 WP11?

ASTM A234 WP11 is a chrome-moly alloy steel grade used for:

• High-temperature service
• Pressure piping systems
• Boilers and heat exchangers

👉 It belongs to ASTM A234 specification for butt weld pipe fittings

A234 WP11 Pipe fittings are produced from A335 P11 seamless pipes,it will connect with A182 F11 Flanges and fittings in the pipeline connection.

Product Range

We manufacture a full range of ASTM A234 WP11 pipe fittings:

Elbows

• 90° Long Radius (LR)
• 90° Short Radius (SR)
• 45° Elbow
• 180° Return Bend

Material Features

WP11 contains:

• Chromium (1.00 – 1.50%)
• Molybdenum (0.44 – 0.65%)

👉 This composition provides:

• High-temperature strength
• Creep resistance
• Oxidation resistance

Manufacturing & Matching Materials

WP11 fittings are typically produced from:

• ASTM A335 P11 seamless pipes
• Forging or hot forming processes

👉 System matching:

• Pipe: ASTM A335 P11
• Fitting: ASTM A234 WP11
• Flange: ASTM A182 F11

👉 Ensures consistent performance in high-temperature systems

Classes of WP11

• Class 1 (CL1) – Normalized
• Class 2 (CL2) – Normalized
• Class 3 (CL3) – Normalized & tempered

👉 Higher class = higher strength

ASTM A234 WP11 Chemical Composition (%)

Notes:

• For each reduction of 0.01% below the specified C maximum, an increase of 0.06% Mn above the specified maximum will be permitted, up to a maximum of 1.35%.
• The sum of Cu, Ni, Cr, and Mo shall not exceed 1.00%.
• The sum of Cr and Mo shall not exceed 0.32%.
• The maximum carbon equivalent (C.E.) shall be 0.50, based on heat analysis and the formula C.E.=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15.

ASTM A234 WP11 PIPE FITTINGS Mechanical properties

Inspection & Testing

• Chemical composition analysis
• Mechanical testing
• Hardness testing
• NDT (UT / RT)
• Dimensional inspection

👉 Ensures compliance with ASTM A234

Size Range

• Seamless: 1/2″ – 24″
• Welded: up to 72″
• Thickness: SCH 10 – SCH XXS

WP11 vs WPB

👉 WP11 is used for high-temperature service (>400°C)

WP11 vs WP22