Product Description
GOST 9941-81 Seamless Stainless Steel Pipes for Corrosion-Resistant and Heat-Resistant
GOST 9941-81 Standard Tolerance For Stainless Steel Seamless Pipe
| Outside Diameter |
Tolerance |
Wall Thickness mm |
Tolerance |
| mm |
Normal |
High |
Higher |
Normal |
High |
Higher |
| 5≤OD≤10 |
±0.3mm |
±0.2mm |
±0.15mm |
0.2 |
±0.05mm |
±0.03mm |
- |
| 10<OD≤30 |
±0.4mm |
±0.3mm |
±0.2mm |
0.3≤WT≤0.4 |
±0.07mm |
±0.05mm |
- |
| 0.5≤WT≤0.6 |
±0.10mm |
±0.07mm |
- |
| 30<OD≤95 |
±1.2% |
±1.0% |
±0.8% |
0.7≤WT≤1 |
±0.15mm |
±0.10mm |
- |
| 1<WT≤3 |
+12.5/-15% |
±12.5% |
+12.5%/-10% |
| OD>95 |
±1.0% |
±1.0% |
±0.8% |
3<WT≤7 |
±12.5% |
+12.5/-10% |
±10% |
| WT>7 |
-125 |
±10% |
- |
| ASTM A312 |
[10.29~48.26] |
+0.4 / -0.8 |
10.3~73 |
+20% / -12.5% |
+6 / -0 |
| 88.9~457 T/D≤5% |
+22.5% / -12.5% |
| (48.26~114.30] |
±0.80 |
88.9~457 T/D>5% |
+15% / -12.5% |
| (114.30~219.08] |
+1.6 / -0.8 |
508above T/D<5% |
+22.5% /-12.5% |
| (219.08~457.20] |
+2.4 / -0.8 |
508above T/D>5% |
+15%/-12.5% |
Product line
Technological process
Mill Inspection and Testing
Main Inspection
Packaging & Shipping
Application
Certifications
Company Profile
Premium Industrial Piping Solutions, Engineered for Excellence
EZ Steel Industrial Co., Ltd is a leading manufacturer of high-performance industrial metal pipelines, specializing in alloy steel, carbon steel, stainless steel, and copper-nickel-based alloy products. With strategically located facilities in Cangzhou, Yangzhou, and Lishui, we deliver globally trusted piping solutions that combine cutting-edge technology, rigorous quality control, and unmatched expertise.
Our Advantages
| Full bank supported company with a perfect line of Credit "AAAAA" |
| The mill certification such as API monogram , ISO ect.... |
| Prices competitively level |
| Financial supports, various of payment term could be acceptable such as L/C, T/T, OA, DP |
| Logistical and shipping chains, we have signed the yearly agreement with the main NVOCC in China can make helps the saves from shipping |
Audited Supplier 
GOST 9941-81 Standard Tolerance For Stainless Steel Seamless Pipe
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