In the long-distance pipeline construction, pipe-line account for a large proportion, generally 35% to 40% of line pipe accounts for investment projects total investment. How to choose a reasonable price, excellent performance pipe is particularly importa

Casing in the production prone to outer folding defects, affect product quality improvement, it needs to be controlled.

Hydrostatic pressure test is conducted using a method for static characteristics of rock deformation measurement indicators.

ERW is the first letter abbreviation for electric resistance welding.
ERW tube and submerged arc welding pipe significantly different, using a pressure-free filler metal welding, the weld is not filled with other ingredients, relying on high-frequency cur