The hydraulic test of the galvanized pipe should be performed in the black tube, and the vortex detection can also be used instead of the hydraulic test. Test pressure or vortex detection comparison sample size shall comply with the regulations of GB 3092.
Steel mechanics performance is an important indicator of ensuring the final performance (mechanical performance) of steel, which depends on the chemical composition and thermal treatment system of steel. In the steel pipe standard, according to different use requirements, stretching performance (tensile strength, yield strength or yield point, elongation point) and hardness, toughness indicators, and high and low temperature performance required by users.
