Steel pipe fasteners are randomly selected, that is, 8 steel pipe fasteners are selected in each batch, and they are intercepted 100mm for inspection. Send 16 right-angle fasteners in each batch, and send 10 rotary fasteners in each batch.
This is to strengthen on-site management. Put an end to unqualified products entering the site, otherwise it will cause hidden dangers and accidents in scaffolding engineering. Steel pipes, fasteners and adjustable supports can pass the inspection, that is, before the first use after entering the construction site, the general contractor is responsible for re-inspection of steel pipes, fasteners and adjustable supports.
The inspection items of pipes include: density, melt mass flow, hydrostatic pressure, ring stiffness, straightness, ring flexibility, thermal stability, volatile content, moisture content, carbon black content, carbon black dispersibility, pigment dispersibility, gas barrier components, etc.
Extended data:
1, test item
Density, melt mass flow rate, thermal stability, volatile matter content, moisture content, carbon black content, carbon black dispersion, pigment dispersion, gas resistance, rapid crack growth resistance, slow crack growth resistance, hydrostatic strength, elongation at break, longitudinal shrinkage, ring stiffness, impact performance, ring flexibility, oven test, creep ratio, hydrostatic test, drop hammer impact, sanitary performance and environmental stress cracking resistance.
2. Test standard
GB/T 158 19-2006 Experimental points and skill requirements of stress cracking sensitivity of polyethylene (PE) pipes for irrigation caused by pull-out fittings; GB/T5836. 1-2006 construction of rigid polyvinyl chloride (PVC-U) pipes for drainage; GB/T5836.2-2006 Construction of Rigid PVC Drainage Fittings; GB/T 10002. 1-2006 rigid polyvinyl chloride (PVC-U) pipe for water supply;
GB/T2020 1-2006 connecting fittings of polyethylene (PE) pressure pipeline machinery for irrigation; GB/T20207. 1-2006 acrylonitrile-butadiene-styrene (ABS) pressure piping system part 1: pipes; GB/T20207.2-2006 acrylonitrile butadiene styrene (ABS) pressure piping system part 1: pipe fittings.
3. The importance of detection
Pipes have been widely used in all aspects of people's lives, and unqualified pipes directly affect people's quality of life and health. At the beginning of this year, some media exposed the problem of individual enterprises using recycled waste to produce drinking water pipes and accessories, which had a bad social impact.
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