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scaffolding steel pipe and fastener quality standards

1. Steel: "Standard" provides: "scaffolding tube current national standards should be used" straight seam welded steel pipe "(GB/T3092) 3 provided for ordinary steel. Its quality should be consistent with current national standard" carbon steel "( GB/T700) in Q235 - A grade steel requirements. the largest single mass of steel scaffolding should not be greater than 25kg, should be used ф48 × 3.5 steel. steel surface should be straight and smooth, there should be no cracks, scarring, delamination, dislocation, hard-bend, glitches, and the deep indentation scheme Road, on the non-perforated pipe shall be coated with rust.

2. Fastener: "Standard" states: "steel tubular scaffolding should be made of malleable iron fasteners, the material should be consistent with current national standard" steel pipe scaffolding fasteners "(GB15831) of the regulations."

Old fastener quality check should be carried out before use. Cracks, deformation is strictly prohibited. There must be replaced sliding bolts of silk, old and new fasteners should be corrosion treatment.

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