Shanxi Zhongcheng Metal Co., Ltd.
| Packaging Details | End caps with thread protectors, bundled in steel-strapped lots, VCI anti-corrosion wrapping, wooden crate or pallet with fumigation certificate |
| Standard | ASTM A312, ASME SA312, EN 10216-5, NACE MR0175/ISO 15156 |
| End Finish | Plain End (PE), Bevel End (BE) per ASME B16.25 |
| Inspection | Ultrasonic Testing (UT) per ASTM E213, Eddy Current Testing, Hydrostatic Test at 1.5× Design Pressure, PMI, MTC EN 10204 3.1 |
| Pressure Rating at 20°C | Up to 6,000 psi (414 bar) depending on OD/WT combination |
| Supply Ability | 300 Tons per Month |
| Delivery Time | 10-20 days for stock, 25-35 days for mill production |
| Tensile Strength | ≥ 490 MPa |
| Application | Urea synthesis, high pressure acid piping, offshore topside piping, wellhead chemical injection |
| Length | 6 Meters (standard), random lengths 4-7M on request |
| Yield Strength (0.2%) | ≥ 220 MPa |
| Outer Diameter (OD) | 33.4mm - 219.1mm (1" - 8" NB) |
| Wall Thickness (WT) | SCH 80S: 3.38-8.18mm, SCH 160S: 4.55-23.01mm |
| Payment Terms | T/T,L/C at sight |
| Material Grade | 904L / UNS N08904 / EN 1.4539 |
| Hardness | ≤ 90 HRB, compliant with NACE MR0175 |
| Brand Name | WNRLN |
| Certification | ISO 9001:2015, PED 2014/68/EU, ASME B31.3, NACE MR0175 |
| Place of Origin | Jiangsu, China |
| Model Number | 904L-HW-SMLS-A312 |
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Product Specification
| Packaging Details | End caps with thread protectors, bundled in steel-strapped lots, VCI anti-corrosion wrapping, wooden crate or pallet with fumigation certificate | Standard | ASTM A312, ASME SA312, EN 10216-5, NACE MR0175/ISO 15156 |
| End Finish | Plain End (PE), Bevel End (BE) per ASME B16.25 | Inspection | Ultrasonic Testing (UT) per ASTM E213, Eddy Current Testing, Hydrostatic Test at 1.5× Design Pressure, PMI, MTC EN 10204 3.1 |
| Pressure Rating at 20°C | Up to 6,000 psi (414 bar) depending on OD/WT combination | Supply Ability | 300 Tons per Month |
| Delivery Time | 10-20 days for stock, 25-35 days for mill production | Tensile Strength | ≥ 490 MPa |
| Application | Urea synthesis, high pressure acid piping, offshore topside piping, wellhead chemical injection | Length | 6 Meters (standard), random lengths 4-7M on request |
| Yield Strength (0.2%) | ≥ 220 MPa | Outer Diameter (OD) | 33.4mm - 219.1mm (1" - 8" NB) |
| Wall Thickness (WT) | SCH 80S: 3.38-8.18mm, SCH 160S: 4.55-23.01mm | Payment Terms | T/T,L/C at sight |
| Material Grade | 904L / UNS N08904 / EN 1.4539 | Hardness | ≤ 90 HRB, compliant with NACE MR0175 |
| Brand Name | WNRLN | Certification | ISO 9001:2015, PED 2014/68/EU, ASME B31.3, NACE MR0175 |
| Place of Origin | Jiangsu, China | Model Number | 904L-HW-SMLS-A312 |
| High Light | UNS N08904 904L stainless steel pipe ，thick wall seamless steel pipe ，high pressure chemical pipe ASTM A312 | ||
When process conditions combine aggressive chemical attack with elevated operating pressures, standard wall pipe specifications are insufficient. Our UNS N08904 904L thick wall seamless pipes in SCH 80S and SCH 160S deliver the structural integrity required for high pressure chemical injection lines, urea synthesis reactors, and offshore processing topsides where both mechanical and corrosion resistance demands are extreme. Manufactured to ASTM A312 with full NACE MR0175/ISO 15156 compliance for sour service environments.
| Nominal Bore (NB) | OD (mm) | SCH 80S WT (mm) | SCH 160S WT (mm) | Max Working Pressure* (bar, SCH 80S) | Max Working Pressure* (bar, SCH 160S) |
|---|---|---|---|---|---|
| 1" (DN 25) | 33.4 | 3.38 | 4.55 | 138 | 191 |
| 2" (DN 50) | 60.3 | 3.91 | 5.54 | 92 | 133 |
| 4" (DN 100) | 114.3 | 6.02 | 8.56 | 75 | 108 |
| 6" (DN 150) | 168.3 | 7.11 | 10.97 | 59 | 93 |
| 8" (DN 200) | 219.1 | 8.18 | 12.70 | 53 | 83 |
* Calculated per ASME B31.3 at 20°C with seamless pipe quality factor E=1.0 and design factor 0.72 of yield. Actual rating subject to project-specific design code and temperature derating.
Thick wall 904L seamless pipes require specialized manufacturing. Our process begins with vacuum induction melting (VIM) followed by electroslag remelting (ESR) to produce ultra-clean ingots with minimized inclusion content and segregation. The ingots are hot extruded into hollow shells at 1150-1200°C under controlled strain rates to ensure complete recrystallization. Cold pilgering (cold reducing) achieves the final wall thickness with dimensional tolerances of ±10% on WT, followed by solution annealing and rapid quenching. This route eliminates the centerline porosity risks associated with conventional piercing processes, delivering 100% dense, homogeneous pipe walls suitable for the most demanding high pressure applications.
All thick wall 904L pipes supplied for sour service are tested in accordance with NACE MR0175/ISO 15156-3 for resistance to sulfide stress cracking (SSC) and stress corrosion cracking (SCC). Hardness is verified at ≤ 90 HRB (22 HRC maximum) on every heat treatment lot. PMI and full traceability from melt to finished product are maintained through our EN 10204 3.1 certified material test certificate system.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Trading Company,Seller
Year Established:
2010
Total Annual:
20000000-50000000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
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