4.1.2 All kinds of raw materials purchased by the production enterprise should meet the material requirements in the Ministry of Housing and Urban-Rural Development’s engineering construction industry standard "Socket-type Disc-type Steel Pipe Support", and on-site inspections should focus on the following items: a) The steel pipe should have no cracks, If there are dents or corrosion, butt welded steel pipes shall not be used; b) The steel pipe shall be straight, and the allowable deviation of the straightness shall be 1/1000 of the pipe length. Both end faces shall be flat, without bevels or burrs; c) The wall thickness of the vertical pole shall not be Less than 3.1mm, the wall thickness of horizontal rods and horizontal inclined rods should not be less than 2.4mm, the wall thickness of standard vertical inclined rods should not be less than 2.2mm, and the wall thickness of heavy vertical inclined rods should not be less than 2.4mm; d) The surface of castings should be Smooth, without blisters, shrinkage holes, cracks and other defects, and the sand on the surface should be removed; e)
T/CMRA 01-2015 history
2016T/CMRA 01-2016 Socket type keyway steel pipe scaffolding
2015T/CMRA 01-2015 Specification for quality management of socket-type buckle-type steel pipe support