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ASTM A335 P22 Black Painting Alloy Steel Seamless Pipe 2.25Cr-1Mo

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ASTM A335 P22 Black Painting Alloy Steel Seamless Pipe 2.25Cr-1Mo

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Brand Name : YUHONG

Model Number : ASTM A335 P22 Alloy Steel Seamless Pipe

Certification : ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Place of Origin : CHINA

MOQ : 100KGS

Payment Terms : L/C,T/T

Delivery Time : 7 DAYS

Packaging Details : BUNDLE, PLYWOOD CASE

Product Name : Alloy Steel Seamless Pipe

Standard : ASTM A335 / ASME SA335

Material : P5, P9, P11, P12, P21, P22 , P91

O.D. : 1/8" to 24"

Schedule : sch.10 to sch.XXS

Length : Single Random, Double Random & Cut Length

Type : Seamless

End : Plain End, Beveled End

Application : Power generation plants, Oil and gas industry,Chemical processing,etc.

High Light : ASTM A335 P22 Alloy Steel Seamless Pipe, 2.25Cr-Mo Steel Seamless Pipe

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ASTM A335 P22 / UNS K21590 Alloy Steel Seamless Pipe 2.25Cr-1Mo Steel Pipe

P22 is comprised predominantly of chromium (2.25%) and molybdenum (1%), which enhances its strength and resistance to high temperatures and pressures. This material has good properties: Good mechanical properties at elevated temperatures. Excellent resistance to oxidation and corrosion, making it suitable for harsh environments. High tensile and yield strength, which allows it to withstand demanding applications.

There are several effective treatments to enhance corrosion resistance and overall durability:

  • Black Paint: This is often used for aesthetic purposes and can provide a basic level of protection against minor corrosion. The paint forms a barrier against moisture and contaminants.

  • Anti-Corrosion Oil: This type of treatment involves applying a specialized oil that penetrates the metal surface to provide long-term protection against rust. It's especially useful for pipes that will be stored for longer periods before use.

  • Galvanized Surface: Galvanization involves coating the steel with a layer of zinc, which protects the underlying metal from rust. This method is highly effective for outdoor applications or environments with high humidity.

ASTM A335 P22 Pipe Specification

Standard ASTM A335 P22, SA335 P22
Size 1/8"- 24"
Schedules sch.10 to sch.XXS
Type Seamless
Length Single Random, Double Random & Cut Length
A335 P22 Pipe End Plain End, Beveled End, Treaded
Usage Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service


Alloy Steel Pipe Chemical composition(%)

Grade C Mn P≤ S≤ Si Cr Mo
P11 0.05-0.15 0.30-0.60 0.025 0.025 0.50-1.00 1.00-1.50 0.44-0.65
P22 0.05-0.16 0.30-0.60 0.025 0.025 ≤0.50 1.90-2.60 0.87-1.13
P5 ≤0.15 0.30-0.60 0.025 0.025 ≤0.50 4.00-6.00 0.45-0.65
P9 ≤0.15 0.30-0.60 0.025 0.025 0.25-1.00 8.00-10.00 0.90-1.10
P91 0.08-0.12 0.30-0.60 0.020/0.010 0.020/0.010 0.02-0.50 8.00-9.50 0.85-1.05
P92 0.07-0.13 0.30-0.60 0.020/0.010 0.020/0.010 ≤0.50 8.50-9.50 0.30-0.60


Alloy Steel Pipe Mechanical properties

Grade Tensile strength Yield strength Elongation
P11, P22, P5, P9 ≥415 ≥205 ≥30/20
P91 ≥585 ≥415 ≥20
P92 ≥620 ≥440 ≥20

Manufacturing Process:

Seamless Pipe Production: The manufacturing process involves heating a solid round billet and then piercing it to form a hollow tube. It is then elongated through mandrel mills, which refine it to the desired dimensions sans any seams, providing superior strength.

Heat Treatment: Post-manufacturing, P22 pipes often undergo heat treatment processes such as normalizing or tempering to enhance mechanical properties.

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



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