Weak current College】 【drainage, heating, sprinkler fire construction quality defects: pipe installation.

<br> Pipe installation <br> 1. basement or ground floor there is a pipeline across the exterior wall structure, not the design requirements and criteria for mapping install waterproof jackets, waterproof casing installation height, coordinates is not accurate, not flat. Impact .-proof effect. <br> <br> 2. piping through structural expansion joints, seismic gap and settlement joint laying, seismic, settlement did not take protective measures. <br> <br> 3. pipe through floors and heating pipe wall, .the leak is not in accordance with the casing, toilets, water-proof rooms, residential Office casing out horizon elevation request placement. <br> <br> 4. casing for electrical welding cutting unevenness. Casing and the gap is not a pipe or .burning material filling, gap width inconsistent. <br> <br> 5. pipe connection has great silk filament phenomenon, exposed silk mouth too long, exposed to the specification requires 2-3 buckles of control is not strict. <br> <br .> 6. flange bolts, diameter and length do not comply with the standards after the outburst, tighten the nut is longer than the norms. Place double gasket or under the nut without gaskets. <br> <br> 7. hoop (sets) .-connect two tube-side gap unevenness, the groove depth, not uniform, not bolted on, after the pipe clamp (sets) of the installation directions are not consistent. <br> <br> 8. when the gasket convex flange connections into .the tube and placed in the double cushion, mat. <br> <br> 9. adhesive pipe, pipe mouth wash gel uneven, with the slit spout. Soaks up sagging pipe plastic not timely clean. <br> <br> 10. .water service pipe and drainage discharge pipe laying of horizontal spacing, vertical spacing is smaller than the specification requirement; water supply pipe laying in the drainpipe is not required by the specifications below an additional casing. <br> <br> 11. through the pipe .under the floor beams, beams and tubular spacing is less than 150mm. <br> <br> 12. horizontal drainage pipe slope control, beyond the minimum slope, grade, slope; tube connection not flat, partial down-slope. <br> .<br> 13. adopt norms require sewage cast iron pipe slope, used in domestic sewage pipe installation, resulting in plastic riser tee from the roof near the beam cannot be successfully passed. <br> <br> 14. drainage plastic pipe is not .in accordance with the design requirements and specification provides for installation of expansion joints; set collar or fire resistant casing. <br> <br> 15. horizontal drainage pipe is not in accordance with the provisions on distance wall flat standard distance setting sweeping mouth. .<br> <br> 16. snorkel higher roof height is inconsistent, the spout is not smooth. <br> <br> 17. on the roof plastic casing out snorkel steel roof height (500mm), cannot protect against shaky measures. < .br> <br> 18. risers vertical control, beyond the stipulated requirements. <br> <br> 19. plastic pipe and tube skin susceptible to injury pollution pipe can not be timely wrapped around wrapped protection, skin injury, unable to fix. .<br> <br> 20. do not follow the specification planted set pipe rack, used the load-bearing walls, substitution bracket. <br> <br> 21. the heating pipe laying, slope control not strictly, to design and specification .requirements. <br> <br> 22. the heating ring tube welding eccentric reducer, eccentric orifice is not properly installed; pipe reducer without steam, bake and swing welding size pipe directly touch the port connection. <br> <br> 23. .heating dry tube angle bending deformation, ovality is not controlled in the stipulation scope. <br> <br> 24. the heating pipes and swing back and forth next riser bend stewed with cold, indentation, deformation, ovality beyond standard requirements. <br .> <br> 25. pipe welding, fixed measures inappropriately, cooling time is short, welding is not formed, welded joints at collapse phenomenon. <br> <br> 26. welded tube weld did not meet the requirements, slag, crater and .porosity, and other defects. <br> <br> 27. welding on hangers, casing. <br> <br> 28. valve installation is easy, not easy to maintain and take up the space effectively. <br> <br> .<br> <br> <br> <br> <br> <br>.