1.Standard:ASTM B338, B337,B861;ASME SB338, 2.Material:GR1 GR2 GR5 GR7 GR9 3.Size:OD3~114mm, wall thickness 0.2~4.5mm, L<8000m Description: 1. Standards: ASTM B338, B337,B861;ASME SB338 2. Material : GR1 GR2 GR5 GR7 GR9 etc. 3. Size: according to customer requirements and drawing processing . 4. Advantage: Light weight,resistance to acid and alkali, dystectic point High precision ...