Quality control point
Tube blank check control point: ① Chemical composition ② Surface quality ③ Size ④ Quality certificate
Tube billet heating control point: ① Heating temperature ② Holding time
Shortage pipe inspection control point: ① Dimension tolerance (outer diameter and wall thickness) ② Surface quality ③ Size ④ Quality certificate ⑤ Chemical composition
Cold working control point: ① Dimension tolerance (outer diameter, wall thickness, length) ② Surface quality ③ Cold rolling process / compliance
Heat treatment control point: ① Temperature control of heat insulation section ② Automatic temperature record ③ The conformity of holding time or process requirements to speed
Physical and chemical test control point: ① Product analysis ② Tensile test ③ Flattening test ④ Expanding test / (optional bending test) ⑤ Hardness test ⑥ Impact test ⑦ Intergranular corrosion test ⑧ 100 times metallographic examination (grain size)
Non destructive testing control point: ① Eddy current testing ET ② Ultrasonic flaw detection UT
Finished product inspection control point: ① Hydraulic test ② Surface quality ③ Dimensions (diameter, wall thickness, length) ④ Product identification
Your position: Home > Quality Control > Quality control procedures
