1. Brand

GR1, Gr2, GR3, GR4,

GR5, GR7, GR 11, Gr12, GR 23.

2. Standards

ASTM b348,ASTM b381.

3. Dimensions and specifications

3.1 welding outer diameter:

Diameter: Φ 40 ~ Φ 3000 mm;

Thickness: 20 ~ 1000mm (special specification can be customized)

4. Test method

Chemical composition test, physical properties;

Test, hardness test, metallographic analysis;

Nondestructive testing: ultrasonic testing;

Penetrant testing, magnetic particle testing