Outer diameter * wall thickness
1: ASTM A789/A789M:12.7~2032 * 0.5-6.35mm
2: ASTM A790/A790M:10.3~273 * 0.5-16mm

Production Standards
ASTM A789/A789M
Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
ASTM A928/A928M
Standard Specification for Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded
Main grades
UNS S31500 S31830 S3s205 S32760
Strainess steel tube standards:Outer diameter * wall thickness
1: ASTM A789/A789M:12.7~203 2 * 0.5-6.35mm
2: ASTM A790/A790M:10.3~273 * 0.5-16mm