IBR NACE MR0175 ASTM A 335 GR P22 ALLOY STEEL SEAMLESS PIPES
Silver Tubes is one of the oldest Manufacturer, Exporter and Supplier of High Quality ASTM A 335/ A691 GR P22 Alloy Steel Seamless & EFW Pipes . We provide a wide range of ASTM A 335/ A691 GR P22 Alloy Steel Seamless & EFW Pipes in Seamless, Welded, SAW, LSAW, DSAW etc. Our range comprises of ASTM A 335/ A691 GR P22 Alloy Steel Seamless & EFW Pipes . Available in different dimensions & grades, these ASTM A 335/ A691 GR P22 Alloy Steel Seamless & EFW Pipes are widely used in different industries like Dairy, Food processing, engineering, construction and many more. We also offer competitive range of ASTM A 335/ A691 GR P22 Alloy Steel Seamless & EFW Pipes as per client’s requirement. Silver Tubes is Approved Manufacturer & supplier of ASTM A 335/ A691 GR P22 Alloy Steel Seamless & EFW Pipes.
Silver Tubes are the best manufacturer, supplier, exporter and stockiest of the commendable quality of ASTM A 335/ A691 GR P2 Alloy Steel Seamless & EFW Pipes. We are providing the comprehensive ranges of same to allow clients to satisfy all application desires. It can be collected from us at specifications that vary in specifications, wall thickness, types, forms, lengths, ends, etc. To enhance the mechanical properties of Alloy Steel Seamless Pipes, steel is alloyed with the ranges of alloys in the total quantity of 1.0% to 50% by weight for producing the alloy steel. Alloy steel addition to the carbon is containing substantial amounts of other alloys such as silicon, molybdenum, nickel, tungsten, chromium, vanadium, manganese, vanadium and phosphorus. These alloyants addition is complementing steel with well-increased strength, hardness, and resistance to chemicals. A691 specification is covering steel pipes of 16” in the outer diameter or larger that is EFW or electric fusion welded with the addition of filler metal, fabricated from the pressure vessel quality plate and it is ideal for the greater pressure services at moderate temperatures. Several grades designate the type of plates used. Classes designate the heat treatment to be performed at the time of production of the pipes, the pipes are pressure tested or weld is radio-graphically examined. ASTM A 335/ A691 Alloy Steel Seamless & EFW Pipes are tested using PMI-IGC test, hardness test, Flattening-flaring test, mechanical-chemical test, macro-micro test for quality assurance. The Pipes are packed using wooden cases, wrapped in plastic sheets for safer delivering.
All Pipe is manufactured and inspected/tested to the relevant standards including
ASTM, ASME, API.
ASTM A 335 GR P22 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]
ASTM A 335 GR P22 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
ASTM A 335 GR P22 Tensile Requirements
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
ASTM A 335 GR P22 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)
