Seamless Ferritic Alloy-Steel Pipe for High Temperature Service. This specification covers both nominal and minimum wall thickness.

U.S. Metals is a world-class supplier of a large variety of Chrome Alloy piping, that includes grade P22.

We can work with you to solve all your piping needs. Our customer service and customer support is how we work to form a strong alliance with you and your company. We work to earn your repeat business with our service.

U. S. Metals stocks ASTM /ASME A/SA P22 Pipe, Heater Tubes, Fittings, Flanges and Valves from ½” NPS through 30” NPS with wall thickness ranging from STD through 4” Thick. We are considered to have the largest inventory of P22 High Energy Pipe, Fittings, Flanges & Valves. USM stock also consists of Minimum Wall Thickness pipe as well as material certified to ASTM/ASME A/SA 213 which is required by some power plant equipment designs. Go to the U. S. Metals comparison chart titled The Difference Between ASTM A213 and ASTM A335 for more information on the difference between P22 and T22.

About ASTM A335 P22 Pipe

Trade Name: 2 ¼ Chrome
Grade: P22
UNS #:K21590
Pipe: A335/SA335
Forged/Bored Pipe: A369/SA369

A335/SA335 Grade P22 Alloy Steel Seamless Pipes are Carbon steel pipes with addition of chromium, molybdenum, and sometimes vanadium. Chromium, or chrome, improves high-temperature strength, increases oxidation resistance and raises the tensile, yield and hardness at room temperatures. Molybdenum increases the strength, elastic limit, resistance to wear, impact qualities and hardenability. It increases the resistance to softening, restrains grain growth and makes chromium steel less susceptible to embrittlement. Moly is also the most effective additive for increasing high temperature creep strength, or creep resistance, and it also enhances the corrosion resistance of steel and inhibits pitting. Grade P22 is used for high temperature service applications and is tolerant to variations in its microstructure.

P22 Pipe Chemical Requirements

  • Carbon - 0.05% - 0.15%
  • Manganese – 0.30% - 0.60%
  • Phosphorous, max – 0.025%
  • Sulfur, max – 0.025%
  • Silicon, max – 0.50%
  • Chromium – 1.90% - 2.60
  • Molybdenum – 0.87% - 1.13%

P22 Pipe Specifications

  • Tensile strength, min, PSI, (MPa) – 60,000 (415)
  • Yield Strength, min, (MPa) – 30,000 (205)

P22 Pipe Applications

P22 is suitable for high temperature environments including those found in the following industries:

  • Pharmaceutical equipment
  • Chemical equipment
  • Sea water equipment
  • Heat exchangers
  • Condensers
  • Pulp and paper industry
  • Off-shore oil drilling companies
  • Power generation
  • Petrochemicals
  • Gas processing
  • Specialty chemicals

Call U.S. Metals today to learn more about our Chrome Moly Alloy Seamless P22 Pipe inventory today.