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  • ASTM A335 P22 Alloy Steel Seamless Pipes

Name:ASTM A335 P22 Alloy Steel Seamless Pipes
Specification:ASTM A335
Size:1/2" to 120"
Rating:SCH10 To SCHXXS
Steel Grade:A335 P5, P9. P11, P22, P91, P92
MOQ:100 KGS
Packing:Standard seawory/airworthy packing
End:Plain ends or bevelled ends
Delivery term:FOB, CIF, CNF, EXW
Payment term:TT or L/C at sight
Loading Port:XINGANG
Deliver mode:By sea, By air, By land

Product Description

ASTM A335 P22 Alloy Steel Seamless Pipes

Hebei Zhongji Is A Global Leading Supplier For Your ASTM A335 P22 Alloy Steel Seamless Pipes Needs.

A335 P22 seamless pipe is a kind of chrome moly pipes (ASME S/A335, Chrome-Moly) listed in ASTM A335, which has become a standard in the power generation industry and the petrochemical industry, not only because of its tensile strength, corrosion resistance and high-temperature strength, but also because of its cost-effectiveness. Chrome Moly Pipes are popular in P-Grades P5, P9, P11, P22, P91 and P92. The most common use of grades P11, P22 and P91 is in the powder industry and petrochemical plants, Grades P5 and P9 are commonly used in refineries. 
We stock a full range of the following A335 Chrome Moly Pipe grades

A335 P22 Seamless Pipe Sizes

1/4” Nominal to 24”O.D. Seamless Alloy Pipe
Wall Thickness – Schedule 40 through XXH

Chrome Moly Pipe Specifications & Grades

SA335 & A335 – Grades P5, P9, P11, P22, P91, P92
A691 1-1/4 Chrome through 9 Chrome (Welded Alternative to A335)

A335 P22 Seamless Pipe Specifications

A/SA335
NPS 1/4″ – 24″
Schedules 40 through 160, STD, XH and XXH 

Scope

This specification covers nominal wall and minimum wall seamless ferritic alloy-steel pipe intended for high-temperature service. ASTM A335 pipe ordered to this specification shall be suitable for fusion welding, bending, flanging (vanstoning), and similar forming operations.


Material & Manufacture

Pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.


Heat Treatment Requirements

P5, P9, P11, and P22    
Grade Heat Treatment Type Normalizing Temperature Range F [C] Subcritical Annealing or Tempering
Temperature Range F [C]
P5 (b,c) Full or Isothermal Anneal
Normalize and Temper ***** 1250 [675]
Subcritical Anneal (P5c only) ***** 1325 – 1375 [715 – 745]
P9 Full or Isothermal Anneal
Normalize and Temper ***** 1250 [675]
P11 Full or Isothermal Anneal
Normalize and Temper ***** 1200 [650]
P22 Full or Isothermal Anneal
Normalize and Temper ***** 1250 [675]
P91 Normalize and Temper 1900-1975 [1040 – 1080] 1350-1470 [730 – 800]
Quench and Temper 1900-1975 [1040 – 1080] 1350-1470 [730 – 800]

A335 P22 Seamless Pipes Chemical Requirements

Grade P-5 P-9 P-11 P-22 P-91 P-91 shall also include the following:
Element UNS Designation K41545 S50400 K11597 K21590 K91560
Carbon 0.15 max 0.15 max 0.05 – 0.15 0.05 – 0.15 0.08 – 0.12 V at 0.18 – 0.25
Manganese 0.30 – 0.60 0.30 – 0.60 0.30 – 0.60 0.30 – 0.60 0.30 – 0.60 N at 0.030 – 0.070
Phosphorous, max 0.025 0.025 0.025 0.025 0.020 Ni at 0.40 max
Sulfur, max 0.025 0.025 0.025 0.025 0.010 Al at 0.02 max
Silicon 0.50 max 0.25 – 1.00 0.50 – 1.00 0.50 max 0.20 -0.50 Cb at 0.06 – 0.10
Chromium 4.00 – 6.00 8.00 – 10.00 1.00 – 1.50 1.90 – 2.60 8.00 – 9.50 Ti at 0.01 max
Molybdenum 0.45 -0.65 0.90 – 1.10 0.44 – 0.65 0.87 – 1.13 0.85 – 1.05 Zr at 0.01 max


A335 P22 Seamless Pipes Machanical Properties

Seamless    
    P-5 P-9 P-11 P-22 P-91 P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC].
Tensile Strength, min., psi
ksi 60 60 60 60 85
MPa 415 415 415 415 585
Yield Strength, min., psi
ksi 30 30 30 30 60
MPa 205 205 205 205 415

Permissible Variation in Wall Thickness

NPS [DN] Designator Tolerance, % from Specified
Over Under
1/8 to 2 1/2 [6 to 65] incl., all t/D ratios 20.0% 12.5%
Above 2 1/2 [65], t/D < or = 5% 22.5% 12.5%
Above 2 1/2 [65], t/D > 5% 15.0% 12.5%
(t = Specified Wall Thickness; D = Specified Outside Diameter)

A335 P22 Seamless Pipes Elongation Requirements

Calculated Minimum Elongation Values
Elongation in 2 in. or 50 mm, min %
Wall Thickness P5, P9, P11, P22   P91
in. mm Longitudinal Transverse   Longitudinal
5/16 (0.312) 8 30 20 20
9/32 (0.281) 7.2 28 19 19
1/4 (0.250) 6.4 27 18 18
7/32 (0.219) 5.6 26 17
3/16 (0.188) 4.8 24 16
5/32 (0.156) 4 22 15
7/8 (0.125) 3.2 21 14
3/32 (0.094) 2.4 20 13
1/18 (0.062) 1.6 18 12

Permissible Variations in Outside Diameter

Outside Diameter at any point shall not vary from standard specified more than:

NPS [DN] Designator Over Under
in. mm in. mm
1/8 to 1 1/2 [6 to 40], incl. 1/64 (0.015) 0.40 1/64 (0.015) 0.40
Over 1 1/2 to 4 [40 to 100], incl. 1/32 (0.031) 0.79 1/32 (0.031) 0.79
Over 4 to 8 [100 to 200], incl. 1/16 (0.062) 1.59 1/32 (0.031) 0.79
Over 8 to 12 [200 to 300], incl. 3/32 (0.093) 2.38 1/32 (0.031) 0.79
Over 12 [300] +/- 1% of the specified outside diameter


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