ASTM A 335/ A691 GR P12 Alloy Steel Seamless & EFW pipes
Silver Tubes is one of the oldest Manufacturer, Exporter and Supplier of High Quality ASTM A 335/ A691 GR P12 Alloy Steel Seamless & EFW pipes . We provide a wide range of ASTM A 335/ A691 GR P12 Alloy Steel Seamless & EFW pipes in Seamless, Welded, SAW, LSAW, DSAW etc. Our range comprises of ASTM A 335/ A691 GR P12 Alloy Steel Seamless & EFW pipes . Available in different dimensions & grades, these ASTM A 335/ A691 GR P12 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 P12 Alloy Steel Seamless & EFW pipes as per client’s requirement. Silver Tubes is Approved Manufacturer & supplier of ASTM A 335/ A691 GR P12 Alloy Steel Seamless & EFW pipes.
Silver Tubes is a leading manufacturer and supplier of high-grade seamless pipes and EFW pipes having made up of different steel alloys. Our products are widely exported to established customers across the globe. With our integrated systems for the production of seamless pipes, our products are reached to the customers in time and are designed according to the industrial standards. Continuous tests are done to develop good quality in the products. ASTM A 335/ A691 GR P12 Alloy Steel Seamless & EFW Pipes refers to electric fusion welding pipe, which is used in welding dissimilar sheets and for melting refractory metals.
Description of the component:
EFW pipes can be defined as the type of
pipe in which a specialized technology called electron fusion welding is used for giving the
pipe a well-designed strength. By using the fusion welding in making of the pipes, the pipes
get the ability to withstand high temperature and pressure. Also, pipes get the strength to
develop corrosion-resistant properties. The construction of this pipe includes rolling the
pipe into a thin cylinder and then welding it with a filler material. The applications of
the EFW seamless pipes include chemical industries and the oil and gas industry.
Documentation and packaging:
Various documents are provided to the
products like raw material certificate, corrosion-resistant certificate, and designing
certificate so that authenticity is obtained in the products.
The ASTM A 335/ A691 GR P12 Alloy Steel Seamless & EFW Pipes are packed
into wooden cases so that safe transportation is done without mishandling.
All Pipe is manufactured and inspected/tested to the relevant standards including
ASTM, ASME, API.
ASTM A335 GR.P22, ASTM A335 GR.P91
ASTM A 335 GR P12 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 P12 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 P12 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 P12 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)
