ASTM A234 WP22 Butt Weld Fittings Specification

ASTM A234 WP22 Butt Weld Fittings Specification

ASTM A234 WP22 specification defines the material requirements for alloy steel pipe fittings used in high-temperature and high-pressure service. WP22 is a Cr-Mo alloy steel grade commonly applied to butt weld fittings such as elbows, tees and reducers in power generation, petrochemical and refinery piping systems.

ASTM A234 WP22 Material Specification Overview

  • Standard: ASTM A234 / A234M

  • Grade: WP22

  • Material type: Cr-Mo alloy steel

  • Product scope: butt weld fittings (elbow, tee, reducer, cap)

Chemical Composition of ASTM A234 WP22

ASTM A234 WP22 is a Cr-Mo alloy steel grade developed for elevated-temperature service. The chemical composition requirements help ensure strength, oxidation resistance and long-term stability in high-temperature piping systems.

Grade C Mn P S Si Cr Mo
A234 WP22 0.05-0.15 0.3-0.6 ≤0.04 ≤0.04 ≤0.5 2-2.5 0.87-1.13

Mechanical Properties of ASTM A234 WP22

Mechanical properties specified in ASTM A234 WP22 support its suitability for high-pressure and high-temperature piping. Typical requirements focus on tensile strength, yield strength and elongation.

Element Tensile Strength Yield Strength (0.2%Offset) Elongation
A234 WP22 415-585 ≥205 ≥20

Applications of ASTM A234 WP22 Pipe Fittings

ASTM A234 WP22 pipe fittings are commonly used in:

  • power generation and thermal systems

  • petrochemical and refinery pipelines

  • high-temperature pressure piping

  • process and heat transfer systems

Download ASTM A234 WP22 Specification PDF

For the full standard content and detailed requirements, the ASTM A234 WP22 specification PDF is available for download for engineering and procurement reference:
Download ASTM A234 WP22 specification PDF

Download ASTM A234 Standard specification PDF

Related ASTM A234 WP22 Pipe Fittings

In addition to the ASTM A234 WP22 specification, the following product pages may be useful for engineering and procurement reference: