Hainan Steel teach you: construction site acceptance steel Information request

Steel use steel, welding materials, coating materials and fasteners should have a quality certificate, must meet the design requirements and existing standards. Raw materials approach, in addition must have a certificate of quality production plant outside, and should be in accordance with the relevant provisions in the contract at the request and under the witness of the Party, supervision, on-site witness sampling, sample, inspection and acceptance, good inspection record. To provide inspection reports and supervision of the Party.
Steel surface must not have scars, cracks, folding and delamination defects; steel end side or the fracture should not have layers, slag. These defects should be piled separately, in order to study treatment. Corrosion depth of the steel surface, the thickness of no more than 1/2 of the negative deviation value; and shall conform to the national standards for Class C and above. Prohibited the use of drugs exfoliation or electrode welding core rust, moisture or caking of the molten solder and burnt rusty wire.
Steel engineering alternative materials. Because individual steel varieties, specifications, performance and other design requirements can not be satisfied the need for alternative materials, to be agreed by the design unit and the Department of Alternative A file, usually based on high strength materials instead of the low strength materials to thick-generation thin. High strength bolts should be torque coefficient retest. Hainan Steel