Jinxi Steel Industry Group Co.Ltd.
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability | 100000 |
| Delivery Time | 7 days |
| Packaging Details | Bundles |
| Product Name | Boilar Steel Pipe |
| Standard | ASTM A335 P91 Boilar Steel Pipe |
| ASTM A335 P91 Tube Type | Seamless |
| ASTM A335 P91 OD | 3.2-762mm |
| ASTM A335 P91 Thickness | 0.4-63.5mm |
| ASTM A335 P91 Length Range | 5.8/11.86 Meter, 20 FT (6 Meter), 40FT (12 Meter) Or Customized |
| ASTM A335 P91 Ends Type | Beveled Ends, Plain Ends |
| ASTM A335 P91 Protection Caps | Plastic Caps |
| Brand Name | Jinxi Pipe |
| Model Number | Alloy Steel Pipe |
| Certification | ISO 9001,BV,SGS,TUV,CE |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram | Supply Ability | 100000 |
| Delivery Time | 7 days | Packaging Details | Bundles |
| Product Name | Boilar Steel Pipe | Standard | ASTM A335 P91 Boilar Steel Pipe |
| ASTM A335 P91 Tube Type | Seamless | ASTM A335 P91 OD | 3.2-762mm |
| ASTM A335 P91 Thickness | 0.4-63.5mm | ASTM A335 P91 Length Range | 5.8/11.86 Meter, 20 FT (6 Meter), 40FT (12 Meter) Or Customized |
| ASTM A335 P91 Ends Type | Beveled Ends, Plain Ends | ASTM A335 P91 Protection Caps | Plastic Caps |
| Brand Name | Jinxi Pipe | Model Number | Alloy Steel Pipe |
| Certification | ISO 9001,BV,SGS,TUV,CE | Place of Origin | China |
| High Light | ASTM A335 P91 Pipe ，Power Generation Steel Boiler Tube ，Oxidation Resistant ASTM Steel Pipe | ||
ASTM A335 P91 Seamless Boilar Steel Pipe For Power Generation
Specification
ASTM A335 P91 Boilar Steel Pipe is a seamless, ferritic alloy steel pipe designed for severe high-temperature and high-pressure service, featuring high strength, creep resistance, and oxidation resistance due to its composition of ~9% Chromium, ~1% Molybdenum, plus Vanadium and Niobium, making it ideal for power plants (supercritical boilers), refineries, and petrochemical facilities. It's a highly refined material produced by precise heat treatments (normalizing and tempering) for superior performance in demanding environments, outperforming older grades like P22.
| American Standard | Standard Name |
| A335 / A335M | Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service |
ASTM A335 P91 Boilar Steel Pipe Chemical Composition
Sources American Standard A335 / A335M TABLE 1 Chemical Requirements
| ASTM A335 Grades |
UNS Designation |
C | Mn | P | S | Si | Cr | Mo | Others |
| P91 Type 1 | K90901 | 0.08-0.12 | 0.30-0.60 | 0.02 | 0.01 | 0.20-0.50 | 8.00-9.50 | 0.85-1.05 | V 0.18-0.25 N 0.030-0.070 Ni 0.40 max Al 0.02 max Nb F 0.06-0.10 Ti 0.01 max Zr 0.01 max |
| P91 Type 2 Heat | K90901 | 0.08-0.12 | 0.3-0.5 D | 0.020 D | 0.005 D | 0.20-0.40 D | 8.0-9.50 D | 0.85-1.05 | V Heat 0.18-0.25 Ni 0.20 max D Al 0.020 max D N 0.035-0.070 D N/Al ratio ≥4.0 Nb F Heat 0.06-0.10 Ti 0.01 max D Zr 0.01 max D Sn 0.010 max D Sb 0.003 max D As 0.010 max D B 0.001 max D W 0.05 max D Cu 0.10 max D |
| P91 Type 2 Product | K90901 | 0.07-0.13 | 0.3-0.5 D | 0.020 D | 0.005 D | 0.20-0.40 D | 8.0-9.50 D | 0.80-1.05 | V Product 0.16-0 27 Ni 0.20 max D Al 0.020 max D N 0.035-0.070 D N/Al ratio ≥4.0 Nb F Product 0.05-0.11Ti 0.01 max D Zr 0.01 max D Sn 0.010 max D Sb 0.003 max D As 0.010 max D B 0.001 max D W 0.05 max D Cu 0.10 max D |
| A New designation established in accordance with Practice E527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS). B Grade P5c shall have a titanium content of not less than 4 times the carbon content and not more than 0.70 %; or a niobium content of 8 to 10 times the carbon content. C Alternatively, in lieu of this ratio minimum, the material shall have a minimum hardness of 275 HV in the hardened condition, defined as after austenitizing and cooling to room temperature but prior to tempering. Hardness testing shall be performed at mid-thickness of the product. Hardness test frequency shall be two samples of product per heat treatment lot and the hardness testing results shall be reported on the material test report. D Applies to both heat and product analyses. E Chromium-Nickel Balance is defined as CNB = (Cr + 6Si + 4Mo + 1.5W + 11V + 5Nb + 9Ti + 12Al) – (40C + 30N + 4Ni + 2Mn + 1CU). F The terms Niobium (Nb) and Columbium (Cb) are alternate names for the same element. |
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ASTM A335 P91 Boilar Steel Pipe Mechanical Properties
Sources American Standard A335 / A335M TABLE 3 Tensile Requirements
| ASTM A335 Grade |
UNS Designation |
Yield strength, Min:ksi/MPa |
Tensile strength, Min:ksi/MPa |
Elongation Requirements % (Min) | Hardness Requirements (Max) | ||
| Brinell | Vickers | Rockwell | |||||
| P91 Type 1 and Type 2 | K91560 | 60/415 | 85/585 | 20 | 190 to 250 HBW | 196 to 265 HV | 91 HRBW to 25 HRC |
ASTM A335 P91 Boilar Steel Pipe Heat Treatment
Sources American Standard A335 / A335M TABLE 2 Heat Treatment Requirements A
| ASTM A335 Grade | Heat Treatment Type | Normalizing Temperature Range F [C] | Cooling Media | Subcritical Annealing or Tempering Temperature,min or range“F[°C] |
| P91 Type 1 and Type 2 | normalize and temper or | 1900-1975 [1040 - 1080] | - | 1350-1470 [730 - 800] C |
| quench and Temper | 1900-1975 [1040 - 1080] | - | 1350-1470 [730 - 800] | |
| A Where ellipses (_) appear in this table there is no requirement. B Alternatively, Grade P36, Class 2 shalbe cooled from the austenitizing temperature by accelerated cooling in air or by liquid quenching. C Except when Supplementary Requirement S7 is specified by the purchaser. D Accelerated cooling from the normalizing temperature shall be permited for section thicknesses greater than 3 in. [75 mm). |
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ASTM A335 P91 Boilar Steel Pipe Permissible Variations in Outside Diameter
Sources American Standard A335 / A335M TABLE 7 Permissible Variations in Outside Diameter
| NPS [DN] Designator | Over | Under | ||
| in. | mm | in. | mm | |
| 1/8 to 1 1/2 [6 to 40], incl. | 1/64 (0.015) | 0.4 | 1/64 (0.015) | 0.4 |
| 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 | |||
ASTM A335 P91 Boilar Steel Pipe Permitted Variations in Wall Thickness
Sources American Standard A335 / A335M TABLE 8 Permitted Variations 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 | 20.00% | 12.50% |
| Above 2 1/2 [65], t/D < or = 5% | 22.50% | 12.50% |
| Above 2 1/2 [65], t/D > 5% | 15.00% | 12.50% |
| (t = Specified Wall Thickness; D = Specified Outside Diameter) | ||
ASTM A335 P91 Boilar Steel Pipe Manufacturing Proces
ASTM A335 P91 Boilar Steel Pipe Application
ASTM A335 P91 Boilar Steel Pipe Packing & Loading
a. 1/2"-2"Plain end with black oil paint, caps both ends, bundles with loading belt.
b. 2"-4"Beveled end with black oil paint, caps both ends, bundles with loading belt.
c. 10"-20"Beveled end with black oil paint, caps both ends, loose packed in to container.
→Boilar Steel Pipe is transported in containers
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Exporter,Trading Company,Seller
Year Established:
1986
Total Annual:
10000000000-30000000000
Employee Number:
100~500
Ecer Certification：
Verified Supplier
Jinxi Steel, a professional manufacturer of steel pipes and fittings, is located in Changsha City. Guided by the scientific development concept, Jinxi Steel will comprehensively reform and develop, adhere to the path of quality and efficiency under the guidance of science and technology, persist in ... Jinxi Steel, a professional manufacturer of steel pipes and fittings, is located in Changsha City. Guided by the scientific development concept, Jinxi Steel will comprehensively reform and develop, adhere to the path of quality and efficiency under the guidance of science and technology, persist in ...
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