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)
