Water supply and drainage, heating, self-spraying fire protection installation construction quality problems
a. Pipe piers, brackets, tow hangers production and installation
1. Brick piers without cement mortar masonry, base dry brick.
2. Brick piers with hollow brick masonry
3. Drainage risers at the bottom of the bend in the pier support is not tight.
4. Gas welding to cut brackets, cut holes.
5. Bracket production before the construction site is not measured, calculations are not careful, the arrangement is not thoughtful. Pipe installation, the ring hole misalignment, re-drilling, pipe rack on the waste hole phenomenon.
6. Against the wall riser card U-type card bracket planted on the outside of the pipe.
7. Planted in the concrete wall to fix the pipe bracket of the expansion bolt exposed wire is too long.
8. In the installation of the bracket side welding bracket, installation of pipes, a dual-use.
9. Laying in the gutter, ceiling with thermal elongation of the thermal insulation of horizontal piping, do not use slip bracket, sliding bracket. Pipes are fixed directly to the bracket.
10. Thermal elongation of the pipe hanger, the boom is not to the opposite direction of thermal expansion according to the design and the relevant provisions of the offset.
11. The riser pipe supports in the same room, in the absence of special requirements for elevation and spacing, are not installed to the same elevation.
12. Plastic pipe and composite pipe bracket, spacing, not planted in accordance with the specification requirements.
II. Pipeline installation:
1. basement or underground structures with pipelines through the outer wall, not in accordance with the design requirements and standard drawings produced and installed waterproof casing, waterproof casing installation height, coordinate position is not accurate, not flat. Affect the waterproof effect.
2. Pipeline through the structural expansion joints, seismic joints and settlement joints laying, no seismic, settlement protection measures.
3. Pipeline through the floor and heat pipe through the wall, omission of casing, not in accordance with the bathroom, waterproofing room, residential office casing out of the floor level height requirements placed.
4. The casing is cut unevenly with electric welding. Casing and pipe gap is not otherwise burned material to fill the solid, gap seam width is not consistent.
5. Pipeline fillet connection with the phenomenon of silk, exposed fillet too long phenomenon, the specification requirements exposed 2-3 buckles of the provisions of the control is not strict.
6. flange connection bolts, diameter and length do not meet the standard, the length of the protruding nut after tightening more than the specification. Placement of double gasket or no gasket under the nut.
7. Clamp (sleeve) type connection of the two pipe ends are not flat, there are gaps, the depth of the two grooves are not consistent, uneven, after the bolt on the pipe is not flat, clamp (sleeve) installation direction is not consistent.
8. flange connection liner convex into the pipe, the placement of double pad, partial pad.
9. Bonding pipe, the mouth of the uneven glue, the mouth of the gap. Stained out of the flow hanging on the pipe glue is not cleaned up in time.
10. water supply pipe and drainage pipe laying horizontal spacing, vertical spacing is less than the specification; water supply pipe laying in the drainage pipe below the specification does not add a casing.
11. Through the pipe under the bottom beam, the bottom of the beam and the pipe skin spacing less than 150mm.
12. Drainage cross-pipe slope control is not strict, exceeding the minimum slope, no slope, inverted slope; pipe connection is not flat, local inverted slope.
13. With the specification requirements for domestic sewage cast iron pipe slope, used in the installation of domestic sewage plastic pipe, resulting in the plastic riser tee from the roof near, when the beam can not pass smoothly.
14. Drainage plastic pipe is not in accordance with the design requirements and code provisions of the installation of expansion joints; set up fire stopping ring or fire casing.
15. Drainage pipe is not in accordance with the specification of the distance from the wall level to set the cleaning mouth.
16. Ventilation pipe height above the roof is not consistent, the pipe mouth is not flat.
17. The height of plastic ventilation pipe steel casing out of the roof (500mm) is not enough to protect the anti-shaking measures.
18. Riser verticality control is not strict, beyond the requirements.
19. Plastic pipe and pipe skin vulnerable to damage and pollution of the pipe can not be wrapped in a timely manner to protect, damage to the pipe skin, can not be repaired.
20. Not in accordance with the norms of planting pipe racks, with over-wall wall load-bearing, alternative bracket.
21. Heating ring pipe laying, slope control is not strict, less than the design and specifications.
22. Heating ring pipe welding eccentric reducer, eccentric port installation is not correct; pipe reducer without steam welding baking dumping mouth, the size of the pipe directly touch the mouth connection.
23. Heating pipe corner simmering deformation, oval degree is not controlled in the specified range.
24. Heating pipe dumping riser back and forth bend using cold simmering, indentation is obvious, deformation, ellipticity beyond the specification.
25. Pipeline welding, improper fixing measures, short cooling time, uneven welded joints, welded joints have collapsed.
26. Welding pipe weld does not meet the requirements of the regulations, there are slag, arc crater and porosity and other defects.
27. Welded joints placed on the support bracket, casing.
28. Valve installation is not easy to operate, not easy to maintain and occupy an effective space.
Three. Sanitary ware installation:
1. Connection of sanitary ware drain coordinates location control is not strict, affecting the discharge of sanitary ware installation.
2. Drainage spigot and floor drain installation, higher than the drainage surface, ground, floor drain water seal height less than 50mm.
3. Sanitary ware support bracket installation is not firm, uneven, and sanitary ware contact is not tight and uneven.
4. connecting toilet mortar paving uneven, uneven, and toilet connection is not tight, uneven. The bolts connecting the toilet are not provided with flexible pads, and the toilet is not stable.
5. Squatting toilet inlet rubber bowl did not use 14 # copper wire two staggered tied tight, flushing pipe inserted into the bowl angle is not appropriate.
6. Drip box and toilet connection is not tight, there is water leakage.
7. Sanitary ware installation, height, level, vertical control is not within the prescribed range.
8. Sanitary ware spout, valve installation height, distance beyond the norms allow deviation.
9. Connected to the sanitary ware drain slope is not up to the specified requirements.
Four. Indoor fire installation:
1. fire hydrant port center from the ground size control is not in the specified range.
2. Hydrant port installed in the door shaft side.
3. Valve center from the side of the box, the box after the inside surface of the prescribed size control is not strict.
4. Fire box box installation is not flat, not solid.
5. and civil construction is not in place, the civil construction of fill holes, extrusion of bricks, box deformation, fire hydrant box door is not installed.
6. With self-help belt short pipe opening low, installation and maintenance is not convenient.
7. hydrant box door aluminum alloy frame, blocking the fire belt bayonet and hydrant mouth connection.
8. Left open door, right open door positioning is not clear, the hydrant port installation position reversed, affecting the use of function.
9. fire box door without "fire hydrant
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Article source real estate e network
Water supply and drainage, heating, self-spraying fire protection installation construction quality summary: pipe installation: 1. basement or underground structures through the outer wall of the pipeline, not according to the design requirements and the standard drawings production Installation of waterproof casing, waterproof casing installation height, coordinate position is not accurate
Article source real estate e network "word mark.
V. Radiator installation:
1. Grouped after the radiator flatness does not meet the allowable deviation requirements.
2. Radiator hook installation is not firm, uneven. Hooks are not planted according to the required number.
3. Grouping of radiator gasket material does not meet the design requirements; grouping of gaskets exposed more than 1mm.
4. The same type of radiator installation, the back of the radiator and decorative wall surface distance is not uniform
5. Ground under the laying of the coils of the buried portion of the joints.
6. Heating plate bending part of the hard bending phenomenon, the radius of curvature does not meet the specification.
7. Connection of the radiator lamp fork bending using cold bending, indentation is obvious, deformation of oval degree beyond the specification requirements.
8. Radiator supply and return pipes without slope, inverted slope.
9. Branch pipe more than 1.5m, leakage of planting bracket.
VI. Automatic sprinkler system:
1. Pipeline installation does not clean up the debris inside the pipeline in a timely manner.
2. Pipeline laying, in the absence of design requirements, the center line of the pipe and beams and columns, the minimum distance between the floor, the control of the specification requirements.
3. Pipe diameter is equal to more than 50mm, no section of the water distribution pipe or water distribution pipe, as well as pipeline change direction, not in accordance with the provisions of the additional anti-shaking bracket.
4. Pipeline bracket installation position, hindering the spray nozzle spray effect.
5. Pipeline support bracket and the distance between the nozzle is less than 300mm.
6. Pipeline through the deformation of the building, do not add a flexible short pipe.
7. Pipeline through the wall and floor, not according to the provisions of the casing. Casing and pipe gap is not filled with non-combustible materials.
8. Pipeline welding ring is located in the casing.
9. Horizontal installation of the pipeline, there is no slope to the drain 0.002-0.005 slope. When it is difficult to utilize the drain in a localized area, appropriate drainage measures are not taken.
10. spray nozzle less than or equal to 5, in the pipeline low concave omission of drainage plug. When the number of nozzles is greater than 5, the drain with a valve is not installed.
11. Nozzle installation, do not use a special plate hand, the use of the framework of the nozzle screw.
12. Sprinkler installation splash tray and ceiling, doors, windows, holes or wall distance does not meet the design requirements.
13. nozzle splash plate higher than the bottom of the beam with the neighborhood or higher than the width of less than 1.2m ventilation pipe belly, the nozzle splash plate high and the bottom of the beam, the ventilation pipe belly of the maximum vertical distance from the norms of the installation of control is not strict.
14. nozzle installed in the top of the partition near the section, the nozzle and the partition of the horizontal distance and the minimum vertical distance does not comply with the provisions of the code.
15. Alarm valve group and hydraulic alarm, water flow indicator, signal valve, throttle device and other components installed does not meet the design requirements and specifications.
VII. Paint insulation:
1. Rust cleaning is not clean, poor adhesion of paint, peeling phenomenon.
2. Paint painting color is not uniform, blistering, flowing and leakage defects
3. Welding mouth exposed wire mouth is not timely anticorrosion treatment, uneven application of antirust paint, ring mouth is not neat.
4. Pipe insulation, insulation seam is not staggered, help tie not tight, inconsistent thickness, uneven.
5. Fixed bracket, valve orchid, valves and live joints on both sides of the specification is not required to leave a gap, do slope.
6. The protective layer and insulation pipe wrapping is not tight, not round, wrap the seam width is not consistent, the flatness does not meet the specified requirements.
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Article source real estate e network
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