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| Customization: | Available |
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| Application: | Automotive Industry, Chemical Industry, Food Industry, Oil and Gas Industry, Pharmaceutical Industry |
| Certification: | ISO9001 |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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Product Name | AISI 317L Welded Stainless Steel Pipes | |
Material | AISI 317L | |
Standard | ASTM A312, ASTM A358 | |
Welding Line Type | •ERW Pipe: Uses high-frequency current to fuse steel strip/plate edges into a longitudinal seam. •EFW Pipe: Submerged arc + resistance heating for full-penetration longitudinal welds. •PAW–GTAW Pipe: Hybrid plasma + GTAW arcs for deep penetration and precise control—ideal for high-integrity applications. | |
Specification | Outer Diameter Options: • Nominal Pipe Size (NPS): 6 in to 72 in (corresponding to actual OD per ASME B36.19M/B36.10M) • Metric OD Range: 168.0 mm to 1829.0 mm | |
Wall Thickness Options: • Standard pipe schedules: SCH 10S, SCH 40S, SCH 80S, SCH 160, and SCH XXS • Metric thickness range: 3 mm to 30.0 mm (covering both seamless pipe and precision tubing applications) | ||
Length Options: • Fixed lengths: 6.0 m, 6.096 m (20 ft), 6.1 m, or 12.0 m — subject to mill capability and order volume • Custom lengths: available upon request, subject to technical feasibility and minimum order requirements | ||
Surface | •As-welded (designated as "+H") •2B finish, •Acid passivation, •Mechanical polishing, •Sand/shot blasting | |
Pipe End | •Plain End (PE) •Beveled End (BE) | |
Packaging and Container Loading | For packaging and container loading, large-diameter pipes are secured using wooden frame supports, with pipe ends protected by caps or tape. Nesting loading is employed to optimize transportation efficiency and reduce freight costs. | |
Custom Processing Services Available | • Precision length cutting • Surface finishing: mechanical polishing (grit grades 180, 240, 320, 400, and 600) • Surface conditioning: shot blasting or shot peening (per ASTM B851 / SAE AMS 2430) • Solvent-based degreasing (to remove oils, greases, and contaminants) • Colour-coding application (per customer-specified scheme) | |
Classes of testing | Class 1: Double-welded with filler metal in all passes, requiring complete radiography of the weld seam. Class 2: Double-welded with filler metal, but no radiography is required. Class 3: Single-welded with filler metal in all passes and completely radiographed. Class 4: Single-welded, with the possibility of no filler metal on the inner surface weld pass. Class 5: Double-welded with filler metal and spot radiography. | |
Delivery Time | • Stock items: 7 working days from order confirmation. • Made-to-order products: 30 calendar days from receipt of confirmed order and technical specifications. | |
Trade Terms | EXW,FOB, FCA,CFR, CIF etc. | |
Loading Port | Ningbo/Wenzhou/Shanghai | |
Payment Collection | We maintain a VTB Bank account, which helps to reduce cross - border collection fees and export - related costs. | |
AISI 317L Key Advantages | •Superior corrosion resistance: Higher Mo content delivers excellent resistance to chloride pitting, crevice corrosion, and seawater — outperforming 316L. •Weldability: Ultra-low carbon prevents intergranular corrosion post-welding; no post-weld heat treatment required. •Acid resistance: Effective in dilute sulfuric acid, phosphoric acid, and acidic flue gas. •High-temperature performance: Stable creep strength and oxidation resistance up to 870°C. •Toughness & ductility: Good formability and machinability for complex fabrication. | |
Application | TP317L welded stainless steel pipes are widely used for severe corrosion working conditions that 304L and 316L cannot adapt to: Pulp & paper bleaching production lines Petrochemical & coal chemical corrosive medium pipelines Seawater desalination & coastal marine engineering Power plant FGD (flue gas desulfurization) systems & condensers Pharmaceutical & fine chemical processing equipment High-salinity wastewater treatment & environmental protection projects | |
Permissible Variations in Dimensions of Stainless Steel Welded Tubes and Pipe | ||||||
Standard | Outside Diameter Tolerance(mm) | Thickness Tolerance | Length Tolerance (mm) | |||
ASTM A312 /ASTM A790 | 10.3≤D≤48.3 | +0.4/-0.8 | 10.3≤D≤73 | +20% / -12.5% | +6/-0 | |
48.3<D≤114.3 | ±0.80 | 88.9<D≤457 T/D≤5% | +22.5%/-12.5% | |||
114.3<D≤219.1 | +1.6/-0.8 | 88.9<D≤457 T/D>5% | +15%/-12.5% | |||
219.1<D≤457.2 | +2.4/-0.8 | D>508 T/D<5% | +22.5%/-12.5% | |||
D>508 T/D<5% | +15%/-12.5% | |||||
ASTM A269 /ASTM A789 | D<12.7 | ±0.13 | D<12.7 | ±15% | D≤38.1 | +3/-0 |
12.7≤D≤38.1 | ±0.13 | D:12.7<D≤203.2 | ±10% | |||
38.1≤D<88.9 | ±0.25 | D>38.1 | +5/-0 | |||
88.9≤D<139.7 | ±0.38 | |||||
139.7≤D<203.2 | ±0.76 | |||||
ASTM A249 | D<25 | +0.10/-0.11 | ±10% | D<50.8 L:+3.0/-0 | ||
25≤D<40 | ±0.15 | |||||
40≤D<50 | ±0.20 | |||||
50≤D<65 | ±0.25 | D≥50.8 L:+5.0/-0 mm | ||||
65≤D<75 | ±0.30 | |||||
75≤D<100 | ±0.38 | |||||
100≤D<200 | +0.38/-0.64 | |||||
200≤D<225 | +0.38/-1.14 | |||||
ASTM A358 | Based on circumferential measurement ±0.5%; Difference between major and minor outside diameters 1% | -0.3mm | L≤7.3M +6/-0 mm | |||
EN 10217-7 | D≤168.3 | D3±0.75% or±0.3mm whichever is the greater | T3 | ±10% or ±0.2mm whichever is the greater | L≤6000 +5/-0mm 6000<L≤12000 +10/-0mm L>12000+ by agreement/-0mm | |
D>168.3 | D2 ±1.0% | |||||
ANSI/ASME B36.10M B36.19M Dimension Comparison Table For Stainless Steel Pipe | |||||||||
Outside Diameter | Wall Thicknesses Schedule | ||||||||
DN(in) | D(mm) | SCH 10S | SCH 20 | SCH STD | SCH 60 | SCH XS | SCH 140 | SCH 160 | SCH XXS |
6" | 168.3 | 3.4 | – | 7.11 | – | 10.97 | – | 18.26 | 21.95 |
8" | 219.1 | 3.76 | – | 8.18 | 10.31 | 12.7 | 20.62 | 23.01 | 22.23 |
10" | 273.1 | 4.19 | 6.35 | 9.27 | 12.7 | 12.7 | 28.58 | 25.4 | – |
12" | 323.9 | 4.57 | 6.35 | 9.53 | 14.27 | 12.7 | 28.58 | 33.32 | 25.4 |
14" | 355.6 | 4.78 | 7.92 | 9.53 | 15.09 | 12.7 | 31.75 | 35.71 | – |
16" | 406.4 | 4.78 | 7.92 | 9.53 | 16.66 | 12.7 | 36.53 | 40.49 | – |
18" | 457.2 | 4.78 | 7.92 | 9.53 | 19.05 | 12.7 | 39.67 | 45.24 | – |
20" | 508 | 5.54 | 9.53 | 9.53 | 20.62 | 12.7 | 44.45 | 50.01 | – |
22" | 558.8 | 5.54 | 9.53 | 9.53 | 22.23 | 12.7 | 47.63 | 53.98 | – |
24" | 609.6 | 6.35 | 9.53 | 9.53 | 24.61 | 12.7 | 52.37 | 59.54 | – |
26" | 660.4 | – | 12.7 | 9.53 | – | 12.7 | – | – | – |
28" | 711.2 | – | 12.7 | 9.53 | – | 12.7 | – | – | – |
30" | 762 | 7.92 | 12.7 | 9.53 | – | 12.7 | – | – | – |
32" | 812.8 | – | 12.7 | 9.53 | – | 12.7 | – | – | – |
34" | 863.6 | – | 12.7 | 9.53 | – | 12.7 | – | – | – |
36" | 914.4 | – | 12.7 | 9.53 | – | 12.7 | – | – | – |
38" | 965.2 | – | – | 9.53 | – | 12.7 | – | – | – |
40" | 1016 | – | – | 9.53 | – | 12.7 | – | – | – |
42" | 1066.8 | – | – | 9.53 | – | 12.7 | – | – | – |
44" | 1117.6 | – | – | 9.53 | – | 12.7 | – | – | – |
46" | 1168.4 | – | – | 9.53 | – | 12.7 | – | – | – |
48" | 1219.2 | – | – | 9.53 | – | 12.7 | – | – | – |
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