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Product Name: steel pipe for farmland irrigation
Steel grade: Q235B
Specifications: 720 x 8 x 12000mm
Outer diameter deviation: tube body is less than or equal to 0.75%D; pipe end is less than + 0.50%D or% + 4.5mm, take small value.
The thickness deviation is less than or equal to 0.1t.
Ellipticity: the maximum outer diameter is less than 1%D, and the minimum outer diameter is less than 1%D in the 1000mm length range of the pipe ends.
Length deviation: + /-50mm;
Straightness: the full length of the steel pipe is less than 0.2%L.
Slant: less than 1.6mm;
Groove angle: 30 degree -35 degrees;
Blunt edge: 1.6 + /-0.8mm;
Outer weld height: less than 3.5mm;
Internal weld height: less than 3.5mm;
The hydrostatic test pressure is more than 4.2MPa, the time of stabilizing is more than 10s.
NDT: every 10 roots should be pumped at least 2 for full length RT.