Welded Stainless Steel Pipe Production Requirement
Welded Steel Pipe End: square ends (straight cut, saw cut, and torch cut). or beveled for welding, beveled.
Welded Steel Pipe Packing: Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleessve, and sackcloth with several steel strips, Plastic caps.
Welded Steel Pipe Test: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.
Welded Stainless Steel Pipe Dimension Chart
| Standard | GB12771-91 | ASTM A312 / A312M | ASTM A249 / A249M | ASTM A688 / A688M | JIS G 3468 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Stainless Steel Grade | 0Cr19Ni9 | |||||||||||||
| 00Cr19Ni11 | TP304 TP304L | TP304 TP304L | TP304 TP304L | SUS 304TPY | ||||||||||
| 0Cr17Ni12Mo2 | TP316 TP316L | TP316 TP316L | TP304N TP316N | SUS 304LTPY | ||||||||||
| 00Cr17Ni14Mo2 | TP321 | TP321 | TP316 TP316L | SUS 316TPY | ||||||||||
| 0Cr18Ni11Ti | TP304LN TP316LN | SUS 316LTPY | ||||||||||||
| (1Cr18Ni9Ti) | SUS 321TPY | |||||||||||||
| Specification range (mm) | D ≤ 560 | 10.3 ≤ D ≤ 762 | D ≤ 127 | 15.9<D ≤ 25.4 | 165.2 ≤ D ≤ 1016 | |||||||||
| 0.4 ≤ t ≤ 8.1 | 75 ≤ D ≤ 1200 or more | |||||||||||||
| t ≥ 0.7 | ||||||||||||||
| Yield strength σ 0.2 ( MPa ) | ≥ 180-220 | ≥ 170-205 | ≥ 170-205 | ≥ 175-240 | ≥ 175-205 | |||||||||
| Tensile strength σ b (MPa) | ≥ 480 ；≥ 520 | ≥ 485 ；≥ 515 | ≥ 485 ；≥ 515 | ≥ 485 ；≥ 520 ；≥ 580 | ≥ 480 ；≥ 520 | |||||||||
| Elongation δ 5 (%) | ≥ 35 (welding state ≥ 25) | ≥ 35 | ≥ 35 | ≥ 35 | ≥ 35 (welding state ≥ 25) | |||||||||
| Weld lateral guiding bending | Front guiding bending | Reverse bending | Reverse bending | Special requirements JIS Z3122 | ||||||||||
| Root guiding bending | Or flatten | |||||||||||||
| Flattening test (mm) | D 〈 200 H=D/3 | Claim | Claim | |||||||||||
| Flattening test | D ≥ 200 string height H=D/4 | Same right | t ≥ 10%D or ≥ 3.4 or D<9.5 | |||||||||||
| NDT | Supplementary requirements (ray flaw detection) | Instead of water pressure | Special requirements JIS Z3106 | |||||||||||
| Supplementary requirement | ||||||||||||||
| Eddy current / flaw detection | ||||||||||||||
| Pressure test | Water pressure | P=2.45 can be replaced by non-destructive testing | ||||||||||||
| GB/T 7735 Class A | ASTM A530 / A530M | Can be replaced by non-destructive testing | AST M A450/A450M | 1.5-2.5 by wall thickness | ||||||||||
| (Mpa) | GB/T 5777 C10 | P=2RtD where R=50% σ 0.2 | ||||||||||||
| Air pressure | P=0.59 | P = 1MPa | ||||||||||||
| Intergranular corrosion test | GB4334.5 | ASTM 262E method | ASTM 262E method | ASTM 262E method | Special requirements JIS G0575 | |||||||||
| (Supplemental requirements) | (Supplemental requirements) | (Supplemental requirements) | ||||||||||||
| Heat treatment | Claim | Claim | Claim | Claim | special requirements | |||||||||
| (TP321 should be stabilized) | (TP321 should be stabilized) | |||||||||||||
| Outer diameter deviation (mm) | Outer diameter | ordinary | advanced | Outer diameter | Allowable deviation | Outer diameter | Allowable deviation | Outer diameter | Allowable deviation | Outer diameter | Allowable deviation | |||
| ＜ 20 | ± 0.30 | ± 0.20 | ||||||||||||
| Welded state | ≥ 20 ～ 50 | ± 0.50 | ±0.40 | |||||||||||
| ≥50 | ±1%D | ±0.8%D | 10.3- ≤ 48.3 | +0.40/-0.80 | ＜ 25.4 | ±0.10 | ＜ 25.4 | ±0.10 | ||||||
| ＜13 | ±0.25 | ±0.20 | ＞ 48.3- ≤ 114.3 | +0.80/-0.80 | 25.4 ～≤ 38.1 | ±0.15 | 25.4～≤38.1 | ±0.15 | ||||||
| ≥ 13 ～ 25 | ±0. 40 | ±0. 3 0 | ＞ 114.3- ≤ 219.1 | +1.60/-0.80 | ＞ 38.1 ～＜ 50.8 | ±0.20 | ＞ 38.1 ～ <50.8 | ±0.20 | ≤ 318.5 | ± 1%D | ||||
| ≥ 25 ～ 40 | ±0. 60 | ±0. 4 0 | ＞ 219.1- ≤ 457 | +2.40/-0.80 | 50.8 ～ ＜ 63.5 | ±0.25 | 50.8～<3.5 | ±0.25 | ||||||
| Solid solution state | ≥ 40 ～ 65 | ±0. 80 | ±0. 6 0 | ＞ 457- ≤ 660 | +3.20/-0.80 | 63.5 ～ ＜ 76.2 | ±0.30 | 63.5 ～ <76.2 | ±0.30 | |||||
| ≥ 65 ～ 90 | ± 1.00 | ±0. 8 0 | ＞ 660- ≤ 864 | +4.00/-0.80 | 76.2 ～≤ 101.6 | ±0.38 | 76.2～≤101.6 | ±0.38 | ＞ 318.5 | ± 0.5%D | ||||
| ≥ 90 ～ 140 | ± 1.20 | ± 1.00 | ＞ 864- ≤ 1219 | +4.48/-0.80 | ＞ 101.6 ～≤ 190.5 | +0.38/-0.64 | ＞ 101.6 ～≤ 190.5 | +0.38/-0.64 | ||||||
| ≥ 140 | By agreement | By agreement | ＞ 190.5 ～≤ 228.6 | +0.38/-1.14 | ＞ 190.5 ～≤ 228.6 | +0.38/-1.14 | ||||||||
| Wall thickness deviation (mm) | Wall thickness | Allowable deviation | + Not specified /-12.5%t | ± 10%t | Average wall thickness tolerance | D ≤ 508 | t ≤ 8 | +15%t/-12%t | ||||||
| ± 10%t | t ＞ 8 | +15%t/-10%t | ||||||||||||
| ＜ 4 | +0.5/-0.6 | Minimum wall thickness tolerance | D>508 | t ≤ 8 | + indefinite /-12.5%t | |||||||||
| ≥ 4 | +12.5%t/-15%t | +20%/-0 | t ＞ 8 | + indefinite /-10%t | ||||||||||
| Out of roundness deviation Δ D/D | ≤ 2%D | |||||||||||||
| Bending degree (mm/m) | 2.0mm/m ～ 2.5mm/m | Reasonable straightness | 0.8mm/900mm | Practical straightness | ||||||||||
| Weld seam height (mm) | ≤ 15%t minimum height is 0.18 | special requirements | ||||||||||||
| Inner seam residual height ≤ 1.5 | ||||||||||||||
| Inner seam residual height ≤ 3.0 | ||||||||||||||
