1. Inspection of raw materials |
1.1 Tensile test on stain of steels |
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2. General inspection of pipes |
2.1 Staingtenning inspection of pipes |
2.2 Surface inspection |
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3. Size inspection |
3.1 Size inspection of pipe diameter |
3.2 Inspection of pipe length |
3.3 thickness inspection |
3.4 Weight inspection |
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4. Pressure testby HYDROSTATIC |
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5. Machinical testing |
5.1 Bending test |
5.2 Flattening test |
5.3 Expansion test |
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6. Threaded end inspecting by |
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