APPLICATION & MATERIAL GUIDE

Pipe Materials for High-Temperature Steam

Material selection depends on design temperature, pressure, creep requirements and the governing piping or boiler code. Carbon steel may suit moderate conditions; Cr-Mo alloy families are considered as temperature and design demands increase.

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YOUR QUESTION

Which pipe, fittings and flanges are used for high-temperature steam?

OPTION 1

Carbon-steel piping family

Grade
A106 Gr B · A234 WPB · A105N
Reference standard
ASTM/ASME product standards

Commonly specified for moderate and elevated-temperature pressure piping within code limits.

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OPTION 2

1.25Cr-0.5Mo piping family

Grade
A335 P11 · A234 WP11 · A182 F11
Reference standard
ASTM/ASME product standards

Used in elevated-temperature power, boiler and refinery service.

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OPTION 3

2.25Cr-1Mo piping family

Grade
A335 P22 · A234 WP22 · A182 F22
Reference standard
ASTM/ASME product standards

Considered for more demanding high-temperature service.

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INFORMATION REQUIRED

Confirm before selection

  • Design pressure and temperature
  • Piping/boiler code and allowable stress
  • PWHT, hardness and welding procedure
  • IBR and inspection scope
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