Design data structure: fastener type steel pipe scaffold new steel pipe inspection rules

Design data structure: fastener type steel pipe scaffold new steel pipe inspection rules
(1) product quality certification.
(2) shall have the quality inspection report, the steel material inspection methods should be consistent with existing national standards "metal tensile test method" concerned regulation, quality should comply with the rules.
(3) the steel pipe surface should be flat and smooth, there should be no cracks, scarring, layered, dislocation, hard to bend, burr, indentation, and deep way.
(4) steel tube diameter, wall thickness, transverse deviation, should be to meet the norms.
(5) steel pipe must be coated with anticorrosive paint.