What are the inspection procedures for pipes and fittings?

1) The raw materials, specifications, types, and quality of pipes and fittings should conform to the current national product specifications and planning requirements. (2) The appearance quality of pipes and fittings should conform to the rules of their product specifications, but also conform to the following rules: 1, no cracks, shrinkage, slag inclusion, folding, heavy skin and corrosion or depression defects that do not exceed the negative deviation of wall thickness; 2, thread appearance is complete without damage, flange sealing surface is flat, bright, no burr and radial groove; 3, the gasket has no aging deterioration or stratification phenomenon, no wrinkles and other defects in the appearance. Inspection method: investigation and inspection (3) The standard size, wall thickness, and allowable deviation of pipes and fittings should conform to the product specifications and planning requirements. Check quantity: each specification, and type of product according to the number of pieces to check 20%, and not less than 1 check method: with a steel ruler and vernier caliper measurement. (4) The pipes and fittings under the following conditions shall be sampled by supervision engineers and reinspected by testing units with corresponding qualifications. The retest results shall conform to the current national product specifications and planning requirements. 1. Reinspection is required in the planning. 2, have doubts about the quality. Check quantity: according to the planning requirements or the quantity required for inspection. 

Cangzhou shenlong pipe  manufacturing co., LTD. Are a collection development, production, sales, and service in the integration of large-scale pipeline equipment manufacturing enterprises, to produce the standard seamless or welded pipe and pipe fittings (elbow, bend, flange, tee, reducer, reducer), pipe cap, head, socket welding parts, threaded weldments, blind plate, block, eight blind plates), etc.