stainless steel
thick-walled pipe
TeCarve’s Stainless Steel Thick-Walled Pipe is engineered to withstand extreme pressure, high temperature, and aggressive environments, making it ideal for heavy-duty industrial applications.
These pipes are crafted from high-grade stainless steel and offer exceptional strength, superior corrosion resistance, and dimensional precision. They are commonly used in high-pressure steam lines, oil & gas pipelines, hydraulic systems, and structural applications that demand uncompromising durability.
TeCarve delivers both seamless and welded thick-walled options, with custom lengths, wall thicknesses, and surface finishes available. Every pipe is rigorously tested to ensure optimal performance and compliance with global standards.
For heavy-wall dimensions, tolerances, and testing requirements, explore our custom stainless steel tube fabrication service.
TeCarve supplies heavy-wall seamless and heavily cold worked (HCW) stainless steel pipe conforming to ASTM A312 / ASME SA312, ASME B36.10M / B36.19M, and EN 10216-5. Engineered for extreme-pressure containment (up to 100+ MPa) and severe mechanical fatigue, available in wall thicknesses up to 59.54 mm (NPS 24 Sch 160), covering Schedule 80S, 160, XXS and custom heavy schedules. Standard dimensional schedules, pressure ratings, and wall thickness tolerances are cataloged in the engineering matrices below.
Heavy-Wall Stainless Steel Pipes & Hollow Bars for Demanding Machining
Heavy wall thickness up to 59.54 mm (NPS 24 Sch 160) in 304, 316L, and duplex grades, with OD/ID tolerances to your drawing and NDT inspection per standard or order.
Specifications
ASTM A312 (Heavy Wall & HCW), EN 10216-5 & International Standards Schedule Matrix
Target Codes & Applications: North America, Middle East, Global EPC — Heavy-Wall High-Pressure Process Piping & Manifolds (Sch 80S, Sch 160 & XXS)
| NPS | DN | OD (mm) | Sch 80S WT | Sch 160 WT | XXS / Heavy WT | OD Tol. (A999) | WT Tol. (t/D > 5%) | Weight (Sch 160 / XXS) |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 15 | 21.3 | 3.73 mm | 4.78 mm | 7.47 mm | +0.4 / -0.8 mm | +20.0% / -12.5% | 1.98 / 2.59 kg/m |
| 3/4" | 20 | 26.7 | 3.91 mm | 5.56 mm | 7.82 mm | +0.4 / -0.8 mm | +20.0% / -12.5% | 2.95 / 3.70 kg/m |
| 1" | 25 | 33.4 | 4.55 mm | 6.35 mm | 9.09 mm | +0.4 / -0.8 mm | +20.0% / -12.5% | 4.31 / 5.54 kg/m |
| 1-1/4" | 32 | 42.2 | 4.85 mm | 6.35 mm | 9.70 mm | +0.4 / -0.8 mm | +20.0% / -12.5% | 5.71 / 7.91 kg/m |
| 1-1/2" | 40 | 48.3 | 5.08 mm | 7.14 mm | 10.15 mm | +0.4 / -0.8 mm | +20.0% / -12.5% | 7.37 / 9.72 kg/m |
| 2" | 50 | 60.3 | 5.54 mm | 8.74 mm | 11.07 mm | ±0.8 mm | +20.0% / -12.5% | 11.30 / 13.68 kg/m |
| 2-1/2" | 65 | 73.0 | 7.01 mm | 9.53 mm | 14.02 mm | ±0.8 mm | +20.0% / -12.5% | 15.17 / 20.74 kg/m |
| 3" | 80 | 88.9 | 7.62 mm | 11.13 mm | 15.24 mm | ±0.8 mm | +15.0% / -12.5% | 21.72 / 28.17 kg/m |
| 4" | 100 | 114.3 | 8.56 mm | 13.49 mm | 17.12 mm | ±0.8 mm | +15.0% / -12.5% | 34.11 / 41.77 kg/m |
| 5" | 125 | 141.3 | 9.53 mm | 15.88 mm | 19.05 mm | +1.6 / -0.8 mm | +15.0% / -12.5% | 50.00 / 58.46 kg/m |
| 6" | 150 | 168.3 | 10.97 mm | 18.26 mm | 21.95 mm | +1.6 / -0.8 mm | +15.0% / -12.5% | 68.75 / 80.60 kg/m |
| 8" | 200 | 219.1 | 12.70 mm | 23.01 mm | 22.23 mm | +1.6 / -0.8 mm | +15.0% / -12.5% | 113.19 / 109.85 kg/m |
| 10" | 250 | 273.0 | 12.70 mm | 28.58 mm | 25.40 mm | +2.4 / -0.8 mm | +15.0% / -12.5% | 175.20 / 157.80 kg/m |
| 12" | 300 | 323.9 | 12.70 mm | 33.32 mm | 25.40 mm | +2.4 / -0.8 mm | +15.0% / -12.5% | 243.08 / 190.28 kg/m |
| 14" | 350 | 355.6 | 12.70 mm | 35.71 mm | — | +2.4 / -0.8 mm | +15.0% / -12.5% | 286.72 kg/m |
| 16" | 400 | 406.4 | 12.70 mm | 40.49 mm | — | +2.4 / -0.8 mm | +15.0% / -12.5% | 371.85 kg/m |
| 18" | 450 | 457.0 | 12.70 mm | 45.24 mm | — | +2.4 / -0.8 mm | +15.0% / -12.5% | 467.43 kg/m |
| 20" | 500 | 508.0 | 12.70 mm | 50.01 mm | — | +3.2 / -0.8 mm | +15.0% / -12.5% | 574.62 kg/m |
| 24" | 600 | 610.0 | 12.70 mm | 59.54 mm | — | +3.2 / -0.8 mm | +15.0% / -12.5% | 823.18 kg/m |
Dimensions adhere to ASME B36.19M (Sch 80S) and ASME B36.10M (Sch 160 & XXS), furnished under ASTM A312/A312M-21 Section 1.4 non-standard heavy-wall provisions. Note on Wall Thickness Tolerance: per ASTM A312 Table 3, for NPS 3" and larger where the t/D ratio exceeds 5% (all heavy-wall schedules), the allowable positive wall tolerance is strictly tightened to +15.0% (under-wall tolerance strictly capped at −12.5% per ASTM A999 Sec 17). Every heat undergoes mandatory full solution heat treatment (≥1040°C) with rapid water quenching.
Target Codes & Applications: Ultra-High Pressure (UHP) Fluid Lines, LDPE Reactors, Hydraulic Accumulators & Subsea Manifolds
| OD (mm) | Wall (mm) | t/D Ratio | HCW Reduction | Calculated Design P (MPa) | Bore Concentricity | Target UHP Application |
|---|---|---|---|---|---|---|
| 33.4 | 6.35 mm | 0.190 | ≥35% cold reduction | 74.2 MPa (10,760 psi) | ≤6.0% radial variation | High-pressure gas injection lines |
| 48.3 | 7.14 mm | 0.148 | ≥35% cold reduction | 57.8 MPa (8,380 psi) | ≤6.0% radial variation | Subsea umbilical chemical conduits |
| 60.3 | 8.74 mm | 0.145 | ≥35% cold reduction | 56.6 MPa (8,210 psi) | ≤6.0% radial variation | Hydro-forming high-pressure barrels |
| 73.0 | 9.53 mm | 0.131 | ≥35% cold reduction | 50.9 MPa (7,380 psi) | ≤6.5% radial variation | Severe-duty hydraulic rams & jacks |
| 88.9 | 11.13 mm | 0.125 | ≥35% cold reduction | 48.8 MPa (7,080 psi) | ≤6.5% radial variation | Petrochemical reactor sampling loops |
| 114.3 | 13.49 mm | 0.118 | ≥35% cold reduction | 45.9 MPa (6,660 psi) | ≤7.0% radial variation | Supercritical steam bypass manifolds |
| 141.3 | 15.88 mm | 0.112 | ≥35% cold reduction | 43.7 MPa (6,340 psi) | ≤7.0% radial variation | High-pressure autoclave bodies |
| 168.3 | 18.26 mm | 0.108 | ≥35% cold reduction | 42.1 MPa (6,100 psi) | ≤7.5% radial variation | Offshore top-drive manifold headers |
| 219.1 | 23.01 mm | 0.105 | ≥35% cold reduction | 40.8 MPa (5,920 psi) | ≤7.5% radial variation | Desalination high-pressure pump headers |
| 273.0 | 28.58 mm | 0.105 | ≥35% cold reduction | 40.8 MPa (5,920 psi) | ≤8.0% radial variation | Nuclear coolant loop auxiliary piping |
| 323.9 | 33.32 mm | 0.103 | ≥35% cold reduction | 40.0 MPa (5,800 psi) | ≤8.0% radial variation | Heavy chemical synthesis columns |
Heavily Cold Worked (HCW) pipe conforms to ASTM A312/A312M-21 Sections 6.3 & 6.4: produced by applying not less than 35% cross-sectional wall/weld reduction prior to final solution annealing (≥1040°C). Plastic deformation completely recrystallizes cast weld dendritic structures into isotropic, equiaxed austenite, matching seamless mechanical toughness and intergranular corrosion resistance. Internal pressure limits calculated per ASME B31.3 thick-wall criteria.
Target Codes & Applications: European Standards & Process Piping: Power Boilers, High-Pressure Exchangers & Petrochemical Systems
| OD (mm) | Wall (mm) | ISO 1127 D3 OD Tol. | ISO 1127 D4 Precision OD | ISO 1127 T2 WT Tol. | ISO 1127 T3 Precision WT | Impact Test (-196°C) |
|---|---|---|---|---|---|---|
| 33.7 | 5.0 mm | ±0.75% (±0.30 mm) | ±0.50% (±0.17 mm) | ±12.5% (±0.63 mm) | ±10.0% (±0.50 mm) | Charpy V ≥60 J |
| 48.3 | 6.0 mm | ±0.75% (±0.36 mm) | ±0.50% (±0.24 mm) | ±12.5% (±0.75 mm) | ±10.0% (±0.60 mm) | Charpy V ≥60 J |
| 60.3 | 7.1 mm | ±0.75% (±0.45 mm) | ±0.50% (±0.30 mm) | ±12.5% (±0.89 mm) | ±10.0% (±0.71 mm) | Charpy V ≥60 J |
| 76.1 | 8.8 mm | ±0.75% (±0.57 mm) | ±0.50% (±0.38 mm) | ±12.5% (±1.10 mm) | ±10.0% (±0.88 mm) | Charpy V ≥60 J |
| 88.9 | 10.0 mm | ±0.75% (±0.67 mm) | ±0.50% (±0.44 mm) | ±12.5% (±1.25 mm) | ±10.0% (±1.00 mm) | Charpy V ≥60 J |
| 114.3 | 13.5 mm | ±0.75% (±0.86 mm) | ±0.50% (±0.57 mm) | ±12.5% (±1.69 mm) | ±10.0% (±1.35 mm) | Charpy V ≥60 J |
| 168.3 | 18.0 mm | ±0.75% (±1.26 mm) | ±0.50% (±0.84 mm) | ±12.5% (±2.25 mm) | ±10.0% (±1.80 mm) | Charpy V ≥60 J |
| 219.1 | 20.0 mm | ±0.75% (±1.64 mm) | ±0.50% (±1.10 mm) | ±12.5% (±2.50 mm) | ±10.0% (±2.00 mm) | Charpy V ≥60 J |
| 273.0 | 25.0 mm | ±0.75% (±2.05 mm) | ±0.50% (±1.37 mm) | ±12.5% (±3.13 mm) | ±10.0% (±2.50 mm) | Charpy V ≥60 J |
| 323.9 | 30.0 mm | ±0.75% (±2.43 mm) | ±0.50% (±1.62 mm) | ±12.5% (±3.75 mm) | ±10.0% (±3.00 mm) | Charpy V ≥60 J |
| 406.4 | 36.0 mm | ±0.75% (±3.05 mm) | ±0.50% (±2.03 mm) | ±12.5% (±4.50 mm) | ±10.0% (±3.60 mm) | Charpy V ≥60 J |
| 508.0 | 45.0 mm | ±0.75% (±3.81 mm) | ±0.50% (±2.54 mm) | ±12.5% (±5.63 mm) | ±10.0% (±4.50 mm) | Charpy V ≥60 J |
Conforms to EN 10216-5 and EN ISO 1127 dimensional requirements. Test category (TC 1 / TC 2), ultrasonic examination and impact testing available as specified in the order.
Target Codes & Applications: Japan & East Asia Heavy Industrial Plants — Schedule 80 / Schedule 160 Piping
| Nominal A | OD (mm) | Sch 80 WT | OD Tol. (Hot-Finished) | OD Tol. (Cold-Finished) | WT Tol. Hot (±12.5%) | WT Tol. Cold (±10%) |
|---|---|---|---|---|---|---|
| 25A | 34.0 | 4.5 mm | ±0.50 mm | ±0.34 mm (±1.0%) | ±12.5% (±0.56 mm) | ±10.0% (±0.45 mm) |
| 32A | 42.7 | 5.0 mm | ±0.50 mm | ±0.43 mm (±1.0%) | ±12.5% (±0.63 mm) | ±10.0% (±0.50 mm) |
| 40A | 48.6 | 5.0 mm | ±0.50 mm | ±0.49 mm (±1.0%) | ±12.5% (±0.63 mm) | ±10.0% (±0.50 mm) |
| 50A | 60.5 | 5.5 mm | ±0.61 mm (±1.0%) | ±0.61 mm (±1.0%) | ±12.5% (±0.69 mm) | ±10.0% (±0.55 mm) |
| 65A | 76.3 | 7.0 mm | ±0.76 mm (±1.0%) | ±0.76 mm (±1.0%) | ±12.5% (±0.88 mm) | ±10.0% (±0.70 mm) |
| 80A | 89.1 | 8.0 mm | ±0.89 mm (±1.0%) | ±0.89 mm (±1.0%) | ±12.5% (±1.00 mm) | ±10.0% (±0.80 mm) |
| 100A | 114.3 | 9.0 mm | ±1.14 mm (±1.0%) | ±1.14 mm (±1.0%) | ±12.5% (±1.13 mm) | ±10.0% (±0.90 mm) |
| 125A | 139.8 | 10.0 mm | ±1.40 mm (±1.0%) | ±1.40 mm (±1.0%) | ±12.5% (±1.25 mm) | ±10.0% (±1.00 mm) |
| 150A | 165.2 | 12.0 mm | ±1.65 mm (±1.0%) | ±1.65 mm (±1.0%) | ±12.5% (±1.50 mm) | ±10.0% (±1.20 mm) |
| 200A | 216.3 | 13.0 mm | ±2.16 mm (±1.0%) | ±2.16 mm (±1.0%) | ±12.5% (±1.63 mm) | ±10.0% (±1.30 mm) |
| 250A | 267.4 | 15.0 mm | ±2.67 mm (±1.0%) | ±2.67 mm (±1.0%) | ±12.5% (±1.88 mm) | ±10.0% (±1.50 mm) |
| 300A | 318.5 | 18.0 mm | ±3.19 mm (±1.0%) | ±3.19 mm (±1.0%) | ±12.5% (±2.25 mm) | ±10.0% (±1.80 mm) |
Complies with JIS G3459:2021 Table 10 (OD and WT tolerances for hot-finished and cold-finished pipes) and Table 8 (Schedule 80 dimensions). Sch 160 supplied to ASME B36.19M / B36.10M. Widely utilized in Japanese-engineered LNG terminals, petrochemical refining towers, and offshore module high-pressure piping.
Target Codes & Applications: China Domestic & Belt-and-Road EPC Infrastructure — Heavy-Wall Fluid & Mechanical Pipe
| OD (mm) | Heavy WT (mm) | Hot-Rolled OD Tol. (PA / PC) | Cold-Drawn OD Tol. (PA / PC) | Hot-Rolled WT Tol. (PA / PC) | Cold-Drawn WT Tol. (PA / PC) | Application Type |
|---|---|---|---|---|---|---|
| 34.0 | 5.0 – 8.0 mm | — | PA ±0.40 mm / PC ±0.30 mm | — | PA +12.5% / −10% / PC ±10% | Hydraulic high-pressure piping |
| 60.0 | 7.0 – 12.0 mm | — | PA ±0.51 mm (±0.85%) / PC ±0.45 mm (±0.75%) | — | PA +12.5% / −10% / PC ±10% | Severe chemical injection lines |
| 89.0 | 9.0 – 16.0 mm | PA ±1.11 mm (±1.25%) / PC ±0.89 mm (±1.0%) | PA ±0.76 mm (±0.85%) / PC ±0.67 mm (±0.75%) | PA +15% / −12.5% (S < 15) or +20% / −15% (S ≥ 15) / PC ±12.5% | PA +12.5% / −10% / PC ±10% | Heavy boiler steam conduits |
| 114.0 | 11.0 – 20.0 mm | PA ±1.43 mm (±1.25%) / PC ±1.14 mm (±1.0%) | PA ±0.97 mm (±0.85%) / PC ±0.86 mm (±0.75%) | PA +15% / −12.5% (S < 15) or +20% / −15% (S ≥ 15) / PC ±12.5% | PA +12.5% / −10% / PC ±10% | High-pressure autoclave headers |
| 168.0 | 15.0 – 25.0 mm | PA ±2.52 mm (±1.5%) / PC ±1.68 mm (±1.0%) | PA ±1.43 mm (±0.85%) / PC ±1.26 mm (±0.75%) | PA +20% / −15% / PC ±12.5% | PA +12.5% / −10% / PC ±10% | Refinery catalytic cracking units |
| 219.0 | 18.0 – 30.0 mm | PA ±3.29 mm (±1.5%) / PC ±2.19 mm (±1.0%) | PA ±1.86 mm (±0.85%) / PC ±1.64 mm (±0.75%) | PA +20% / −15% / PC ±12.5% | PA +12.5% / −10% / PC ±10% | Subsea flowline manifold piping |
| 273.0 | 22.0 – 35.0 mm | PA ±4.10 mm (±1.5%) / PC ±2.73 mm (±1.0%) | PA ±2.46 mm (±0.9%) / PC ±2.18 mm (±0.8%) | PA +20% / −15% / PC ±12.5% | PA +12.5% / −10% / PC ±10% | Thermal power plant main steam |
| 325.0 | 25.0 – 40.0 mm | PA ±4.88 mm (±1.5%) / PC ±3.25 mm (±1.0%) | PA ±2.93 mm (±0.9%) / PC ±2.60 mm (±0.8%) | PA +20% / −15% / PC ±12.5% | PA +12.5% / −10% / PC ±10% | Nuclear power auxiliary piping |
| 426.0 | 28.0 – 50.0 mm | PA ±6.39 mm (±1.5%) / PC ±4.26 mm (±1.0%) | PA ±3.83 mm (±0.9%) / PC ±3.41 mm (±0.8%) | PA +20% / −15% / PC ±12.5% | PA +12.5% / −10% / PC ±10% | Heavy forging press cylinders |
Conforms to GB/T 14976-2012 (Seamless stainless steel pipes for fluid transport). Values given for Ordinary Class (PA) and High-Precision Class (PC). Hot-rolled pipe available from OD ≥ 68 mm. Minimum wall thickness delivery tolerances: hot-rolled (W-H) Smin < 15 mm PA +25% / 0, ≥15 mm PA +32.5% / 0, PC +22.5% / 0; cold-drawn (W-C) PA +22% / 0, PC +20% / 0. Through-wall metallurgical soundness verified by non-destructive testing.
- Length Capabilities: Standard random 5–7 m, fixed 6.0 m / 11.8 m, or custom cut-to-length billets with precision beveled ends (ASME B16.25).
- Available Heavy-Wall Alloys: TP304/304L, TP316/316L, TP321, TP347H, 310S, 2205 Duplex (UNS S32205), 2507 Super Duplex (UNS S32750), 904L.
- Special Processing: Gun drilling & deep-hole boring for ultra-heavy hollow bars, precision ID counter-boring for orbital alignment, and external CNC turning.
- Mandatory Testing: Full-body volumetric NDT, hydrostatic verification up to 100 MPa, and cryogenic Charpy V-notch impact testing per applicable manufacturing codes.
Get Your Thick-Walled Pipe Quote
Sourcing heavy-wall stainless steel pipe (Schedule 80, 160, XXS, or custom heavy walls) for extreme high-pressure reactors, hydraulic cylinders, or severe corrosive containment? Contact our sales engineering desk for live pricing, non-destructive test documentation, and trial orders (100–300 kg MOQ supported).
Heavy wall containment designed for extreme hydraulic burst pressure, high temperature, and cyclic fatigue.
Short heavy-wall tube cuts provided for mechanical testing, bevel weld-prep review, and ultrasonic verification.
Conduct machining trials, deep-hole drilling, or pressure-vessel prototype testing with low-MOQ trial orders.
100% Ultrasonic Testing (UT) for internal flaw detection, hydrostatic pressure certification, and EN 10204 3.1 traceability.
Standards
→ Scroll right for full chemistry & mechanical data
| Grade | US (UNS) | EN (W.Nr.) | Japan (JIS) | China (GB/T) | C % (Max) | Si % (Max) | Mn % (Max) | P % (Max) | S % (Max) | Cr % | Ni % | Mo % | Tensile σb (Min.) | Yield σ0.2 (Min.) | Elongation (Min.) | Hardness (Max) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2205 Duplex* | S32205 | 1.4462 | SUS329J3L* | 022Cr23Ni5Mo3N* | 0.030 | 1.00 | 2.00 | 0.030 | 0.020 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 655 MPa (95 ksi) | 450 MPa (65 ksi) | 25% | ≤31 HRC / ≤293 HB |
| 304 | S30400 | 1.4301 | SUS304 | 06Cr19Ni10 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-11.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 304L | S30403 | 1.4307 | SUS304L | 022Cr19Ni10 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | — | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤92 HRB / ≤215 HV |
| 310S | S31008 | 1.4845 | SUS310S | 06Cr25Ni20 | 0.08 | 1.50 | 2.00 | 0.045 | 0.030 | 24.0-26.0 | 19.0-22.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 316 | S31600 | 1.4401 | SUS316 | 06Cr17Ni12Mo2 | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 316L | S31603 | 1.4404 | SUS316L | 022Cr17Ni12Mo2 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 485 MPa (70 ksi) | 170 MPa (25 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 317L | S31703 | 1.4438 | SUS317L | 022Cr19Ni13Mo3 | 0.030 | 0.75 | 2.00 | 0.045 | 0.030 | 18.0-20.0 | 11.0-15.0 | 3.0-4.0 | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 321 | S32100 | 1.4541 | SUS321 | 06Cr18Ni11Ti | 0.08 | 0.75 | 2.00 | 0.045 | 0.030 | 17.0-19.0 | 9.0-12.0 | — | 515 MPa (75 ksi) | 205 MPa (30 ksi) | 35% | ≤95 HRB / ≤215 HV |
| 410 | S41000 | 1.4006 | SUS410 | 12Cr13 | 0.15 | 1.00 | 1.00 | 0.040 | 0.030 | 11.5-13.5 | — | — | 450 MPa (65 ksi) | 205 MPa (30 ksi) | 20% | ≤96 HRB / ≤210 HV |
| 904L* | N08904 | 1.4539 | N/A | 015Cr20Ni18Mo6CuN* | 0.020 | 1.00 | 2.00 | 0.045 | 0.035 | 19.0-23.0 | 23.0-28.0 | 4.0-5.0 | 490 MPa (71 ksi) | 215 MPa (31 ksi) | 35% | ≤90 HRB / ≤200 HV |
- Standards Conformance: ASTM A312/A358 · EN 10216-5/10217-7 · JIS G3459 · GB/T 14976/13296 · ISO 4200/1127
- Delivery Condition: Solution Annealed & Pickled (AP) / Bright Annealed (BA) / Polished, or as requested.
- Mill Test Certificate: 100% full material traceability with EN 10204 3.1 MTC provided with every shipment.
- Cross-Reference Note: 2205 duplex and 904L JIS/GB cross-reference figures are compiled from secondary industry sources — please confirm exact specification and heat-specific mill test certificate with TeCarve for critical applications.
Features
• Thick wall for high-pressure resistance
• Excellent mechanical strength
• Available in custom diameters and grades
• High corrosion and oxidation resistance
• High-pressure oil & gas pipelines
• Power plant and boiler systems
• Industrial hydraulic and mechanical structures
•Chemical process transport lines
Applications
Thick-Walled Stainless Pipe: Engineering Metallurgy & Process Control
Key engineering considerations for high-pressure containment, radial eccentricity control, and cross-sectional thermal treatment.
1. High-Pressure Mechanics (Lamé Criteria)
When the wall-to-diameter ratio exceeds 10% ($t/D > 0.1$), thin-wall hoop stress assumptions fail. Thick-wall design requires Lamé's classical thick-cylinder equations where maximum hoop and shear stresses concentrate at the internal bore ($r = r_i$). Under internal pressure, peak bore stress dictates material yield behavior. TeCarve ensures superior internal bore surface integrity, strict straightness, and micro-defect elimination to prevent premature fatigue notch initiation in ultra-high pressure service (up to 100+ MPa / 15,000 psi).
2. Radial Eccentricity Control & Boring
Mannesmann rotary piercing of heavy solid billets inherently induces wall thickness eccentricity up to 10%–12.5% due to mandrel deflection and billet temperature gradients. For critical high-pressure lines and hydraulic cylinders, TeCarve controls radial eccentricity via multi-pass cold pilgering over tapered mandrels or precision deep-hole gun drilling and internal counter-boring, tightening wall uniformity within 5%–7% to eliminate localized stress concentrations.
3. Thermal Quench Dynamics & HCW
Due to the low thermal conductivity of austenitic stainless steel (~15 W/m·K), heavy walls (>15–50 mm) create steep cross-sectional thermal gradients during solution annealing (1040°C–1150°C). To prevent chromium carbide precipitation ($M_{23}C_6$) and sensitization at the mid-wall core, we enforce prolonged soaking times followed by high-velocity agitated water quenching with forced internal bore flushing, cooling the core faster than 55°C/s to ensure uniform intergranular corrosion resistance (ASTM A262 Practice E).
4. 100% Volumetric Ultrasonic Examination
Heavy-wall pressure containment cannot rely on surface inspection alone. Every thick-wall tube undergoes 100% volumetric Ultrasonic Testing (UT per ASTM A388 / EN ISO 10893-10) with longitudinal normal-beam and angle-beam shear waves to detect internal laminations, forging bursts, and sub-surface inclusions. Hydrostatic proof testing up to 50–100+ MPa and through-thickness cryogenic Charpy V-notch impact tests at −196°C verify fracture toughness.
For severe-service heavy wall piping, check how to verify our partner factories' heavy-wall piercing, ultrasonic testing, wall-thickness uniformity, and mechanical property testing.
Production Capabilities: Workshop Agile Sourcing vs. Primary Mill High-MOQ Batches
Bridging heavy-wall engineering specifications with commercial manufacturing reality: Major state-owned and tier-1 primary mills typically enforce minimum heat batch orders of 3 to 10 metric tons per diameter for heavy schedules (Sch 160 / XXS), often entailing 90–120 day delivery cycles. For custom valve manifolds, hydraulic cylinders, and prototype piping skids requiring flexible batch sizes, TeCarve coordinates agile production across specialized Wenzhou piercing and deep-hole boring workshops—supporting flexible trial orders from 100 to 300 kg. Standard warehouse stock dimensions dispatch within 7–10 days, while custom-machined heavy-wall bores ship within 10–25 days with full heat-batch traceability.
Quality Assurance & Accredited Certification Standards
TeCarve operates under accredited management systems certified by Shanghai Ingeer Certification Assessment Co., Ltd.: ISO 9001:2015 (Quality Management), ISO 14001:2015 (Environmental Management), and ISO 45001:2018 (Occupational Health & Safety). Every heavy-wall delivery includes authentic EN 10204 3.1 Mill Test Certificates detailing exact ladle chemical analysis, through-thickness tensile & yield figures, volumetric non-destructive examination, and pressure verification records. We maintain strict compliance boundaries and explicitly avoid false or unverified certification claims.
Quality Control
• UT, ET, and Hydrostatic testing
• Mechanical property testing
• Visual & dimensional inspections
• Certified mill test reports and third-party inspections
packaging
PVC Wrapping
& End Caps
Custom Barcoding
& Labeling
Anti-Corrosion
& Moisture Protection
Seaworthy Wooden Cases & Pallets
Thick-walled Pipe Factory & Export Photos
Real product, inspection, packaging and loading photos.
Tailored Solutions, Timely Fulfillment
CUSTOMIZATION
& DELIVERY
Flexible Custom Manufacturing
We customize stainless steel thick-walled pipe by outer diameter, heavy wall thickness, custom length, seamless or welded construction, material grade, surface finish, and dimensional tolerance for demanding service.
Low MOQ & Rapid Prototyping
Small batch customization and sample production are supported, helping you shorten your development cycle and market entry.
Optimized Lead Time
In-stock standard sizes ship within 7–10 days. Custom specifications typically ship within 10–25 days after deposit, depending on order volume, dimensions, and surface finish. The full cycle—from inquiry and drawing confirmation through sampling, production, inspection, and dispatch—typically takes 33–55 days for custom items.
Global Logistics & On-Time Delivery
For thick-walled pipe shipments worldwide, seaworthy wooden cases and pallets are the primary transport support, supplemented by anti-corrosion and moisture protection.
How your order is made, checked and shipped
Tube forming at the partner factory
Heat treatment (annealing)
Dimensional inspection
Alloy verification with a handheld analyzer
Export packing
Container loading
What Global Buyers Say About TeCarve Tubing
“I've received the goods and everything is fine.”
“The goods already send to customers. I am waiting for the next order from them.”
“…there is no need of inspection this time… I trust in your product.”
Frequently Asked Questions
What is thick-walled stainless steel pipe?
Thick-walled stainless steel pipe has a wall-to-OD ratio typically above 10%, designed for high-pressure, high-temperature, or high-stress applications. It is produced by cold-drawing or hot-extrusion from solid billets and is used in hydraulic cylinders, pressure vessels, and chemical reactors.
What pressure ratings do thick-walled stainless steel pipes support?
Working pressure depends on OD, wall thickness, and grade. Working pressure should be calculated from OD, wall thickness, grade, design code, temperature, and corrosion allowance for each project. Pressure calculations and hydrostatic test certificates are provided with each order.
What size range is available for thick-walled stainless steel pipe?
Thick-walled stainless steel pipe is available in outer diameter from 6 mm to 2000 mm with wall thickness of 5 mm or above. Grades include 304, 316L, 321, 316Ti, and duplex 2205/2507. Customer drawings with specific bore and OD combinations are accepted.
What standards apply to thick-walled stainless steel pipe?
Our thick-walled pipes comply with ASTM A312, ASTM A358, EN 10216-5, and EN 10217-7. Available testing includes hydrostatic test, ultrasonic inspection (UT), and PMI (positive material identification) per customer project specification.
Which grade is best for high-pressure stainless steel pipe service?
Grade 316L is standard for high-pressure corrosion-resistant service. Grade 321 or 316Ti is recommended above 500°C for stabilized creep resistance. Duplex 2205 offers approximately double the yield strength of 304/316L, enabling thinner walls and lighter weight at equivalent pressure rating.
Does ASTM A312 cover heavy-wall pipes beyond Schedule 80S?
Yes. Heavy-wall pipe exceeding Schedule 80S (up to 59.54 mm wall thickness, NPS 24 Sch 160) is supplied to custom dimensions while satisfying chemical, mechanical, and testing requirements of ASTM A312.
Can TeCarve supply heavy-wall pipes for lathe machining?
Yes. For mechanical hollow bars and machining blanks, we supply OD/ID tolerances to your drawing, ensuring sufficient clean-up allowance for finish machining.
What non-destructive testing is performed on heavy-wall pipes?
Every heavy-wall pipe undergoes NDT per standard or order to ensure internal sound quality. Hydrostatic testing is conducted per standard or customer order specifications, supported by partner factory test benches rated up to 20–30 MPa.
Contact TeCarve