The product standards that scaffolding steel pipes should follow include

The product standards that scaffolding steel pipes should follow include:
1. The product material should comply with the provisions of Q235-A grade steel in the current national standard GB 700-88 "Carbon Structural Steel", and the enterprise must provide a material report of the steel when filing;
2. The mechanical properties of the product should comply with the requirements of national standards GB/T 13793-92 "Straight seam welded steel pipes" or GB/T 3091-2001 "Welded steel pipes for low-pressure fluid transportation";
3. The appearance dimensions comply with the requirements of JGJ130-2001 "Technical Specification for Safety of Steel Pipe Scaffolding with Couplers in Construction", with an outer diameter of 48mm and a negative tolerance of 0.5mm; Wall thickness 3.5mm, negative tolerance 0.5mm.
The product standards that fasteners should follow include:
1. Scaffold fasteners (made of cast iron malleable iron or cast steel) shall comply with the standard GB15831-1995 "Steel Pipe Scaffold Fasteners"; 2. Steel plate stamping fasteners shall comply with the standard JG3061-1999 "Steel Plate Stamping Fasteners". The inspection items of steel pipes include yield strength, elongation, bending of steel pipes, appearance quality, outer diameter, wall thickness, end face deviation, etc.
The main indicators that need to be tested for fasteners include mechanical properties, appearance of fasteners, and accessory quality.
The mechanical properties of fasteners mainly include: the sliding resistance, failure resistance, and torsional stiffness of right-angle type fasteners; The anti slip and anti failure performance of rotating type fasteners; Tensile performance of docking type fasteners; And the compressive performance of the base (as shown in the table below).
Performance Name: Fastener Type: Performance Requirements: When anti slip right angle P=7.0 kN, Δ 1 ≤ 7.0 mm; When P=10.0 kN, Δ When 2 ≤ 0.5 mm rotation P=7.0 kN, Δ 1 ≤ 7.0 mm; When P=10.0 kN, Δ When 2 ≤ 0.5 mm anti failure right angle P=25.0 kN, each part shall not be damaged. When P=17.0 kN, each part shall not be damaged. When the torsional stiffness right angle torque is 900 N · m, θ≤ When the 4 ° tensile butt joint tensile strength P=4.0 kN, Δ≤ When the 0 mm compressive base P=50.0 kN, all parts shall not be damaged
The appearance and accessory quality of fasteners mainly include the following thirteen indicators:
1. Cracks are not allowed in all parts of the fastener;
2. The opening distance between the cover plate and the seat shall not be less than 49 (52) mm;
4. The fasteners are not allowed to shrink or loosen in the main parts;
5. The sand holes on the surface of the fastener exceeding 10 mm2 should not exceed three places, and the cumulative area should not exceed 50 mm2; 5. The cumulative sand adhering area on the surface of the fastener should not exceed 150 mm2;
6. The wrong box should not exceed 1 mm;
7. The height (or depth) of the convex (or concave) surface of the fastener should not exceed 1 mm;