CK brand steel pipe fittings produced by Weifang Jinmaoma Steel Pipe Factory are divided into four categories: standard Ma steel pipe fittings, lining plastic composite steel pipe fittings, special-shaped Ma steel pipe fittings and grooved pipe connecting pieces. Then the following small series will introduce you to the general inspection content of Ma Steel Pipe:
1. The steel symbol and the symbol must have the certificate of conformity of the manufacturer. Otherwise, the inspection of the missing items should be in accordance with the current national or ministerial technical standards.
2. Steel pipes and fittings should be checked for specifications, materials and models according to design requirements before use.
3. Steel pipes and fittings shall be visually inspected before use, and the surface shall be required:
(1) No defects such as cracks, shrinkage holes, slag inclusions, folding, heavy skin, etc.
(2) Corrosion or depression that does not exceed the negative deviation of the wall thickness.
(3) The thread sealing surface is good, and the precision and roughness of the skin meet the design requirements or manufacturing standards.
(4) Alloy steel pipes and fittings shall be marked with materials.
5. Alloy steel pipes and fittings are reviewed by spectral analysis or other methods before use and marked.
6. Except for austenitic stainless steel, steel pipes and fittings with working environment temperature lower than -20 °C should have low temperature impact toughness test results, otherwise they should be tested according to the "Metal Low Temperature Impact Toughness Test Method" (YB19-64). Its index should not be lower than the lower limit of the specified value.
The production of Ma steel pipe must be carried out in strict accordance with the standards. The grooved pipe connection produced by Weifang Jinmaoma Steel Pipe Factory is casted by an advanced level of ball-milled cast iron casting process and easy-to-control electric furnace. The internal structure of the product is stable and the appearance Smooth and beautiful, mainly used in pipeline fire protection, water supply and drainage, chemical, mining and other industries.
