【 Weak current college 】 building water engineering construction supervision and quality control

Supervising engineer for water engineering construction quality problems and supervise contractors comply strictly with the construction technology practice to eliminate common problems.
1, pipeline construction job conditions of control points
1.1 buried pipeline must lay a solid without disturbing the soil layer, or laying in as designed by compaction of loose soil, piping and pipeline support or support Pier shall not lay in the permafrost layer and untreated disturbed on the loose Earth; Groove in rock to clear, disturbance of soil to be treated to prevent the pipe causes uneven subsidence, pipe laying quality accident of elevation and coordinates to meet design requirements.
Outdoor construction of pipeline in the rainy season, should complete the Groove drainage measures cannot produce water soaks fluted, should prevent surface water pipe trench in exile, causing drift tube to tube fracture accident.
Winter outdoor pipe construction, installation of cast iron pipes should not be used for asbestos-cement interface.
Buried pipeline installation ready to Groove to backfill the pipeline before the pressure test hidden check, fill in the "hidden" better acceptance record hidden formalities.
1.2 concealed underground pipe should not cover trench pipe trench cover and suspended ceiling is not closed before installing. Pipeline pressure and pipe insulation work complete acceptance can be allowed to cover Groove cover and closed ceiling.
1.3 Ming installed pipe must be installed in the floor construction structure roof finishes, pipe carriers, Elevator pieces are strong, they should be installed in the correct position, appearance tidy.
1.4 risers should be installed after the completion of the main structure, each floor elevation control line to correct, the concealed pipes shafts that template, sundries and clean, and in accompanying measures that fall between pipe wells sealed Brown and thousands of miles to meet the design requirements.
1.5 branch pipe installation (including installation, dark Branch) should be completed in the masonry walls and decoration.
2. dry pipe installation control points
(1) water supply for cast iron pipe installation
Installation to check the pipe, socket socket medial and lateral end asphalt coatings are clean, socket towards (top), order, join the corresponding clearance for conformance to specifications: tube straightening leveling after a fixed time, pipe bend pen beginning should support the top row to prevent twisted mouth move, when steering tube head tube seals and whether a thousand red close, if there is a small animal and garbage pollution; various interface meets technology practice.
(2) water galvanized pipe installation
Check the installation order (usually start from total entrance), pre-installation check tube bore, after installation, check the direct sun, and review the location of the estuary of the rejection, the direction and elevation, all spout to install temporary wire plug.
(3) non-galvanized carbon steel pipe installation
Use the interface to be consistent with the design requirements and rules of construction technology, piping pressure after the rust paint insulation work.
(4) buried pipelines in the rear of the permitted pressure test of subtle acceptance to backfill.
3. vertical pipe installation
(1) riser Ming installed: supervision should check the installation of pipe vertical spacing, and walls, set aside the height of the estuary of the rejection and direction, stop doors installed to, and so on are correct.
(2) riser concealed: pipe wells in risers to install card pieces should be set in the pipe-head, upper and lower section steel brace dipping line installed card. Install buried inside a wall of risers, should be reserved for civil masonry wall ducts, install fixed pipeline after verification and swing opening position is correct, and swing gate to block installation of temporary wires.
4, the branch pipe installation
Branch pipe of concealed and Ming installed should first approved branch pipe height, different health apparatus for hot and cold water reserved outlet height and location are correct, and then leveling alignment fixed pipes card, plus a good temporary wire plug. Hot water pipes in cold water pipes, branch pipes reserved outlet position should be left heat right cold.
5, pipe pressure test, flushing
(1) water supply piping in subtle, should urge contracting units do immersion and individual water pressure test. Pipeline system installation on completion of the integrated water pressure test. Hydrostatic testing is put the net air, water-filled man, when the pressure after the pressure rises to test water pressure, leak check, test water pressure relief allowed within, can apply for acceptance procedures. In winter the temperature pressure testing environment, the pipeline should be + 5. C above, summer pipeline pressure test environment should prevent condensation pipe.
(2) pipe flushing: pipeline in pressure test is completed you can do to clean, rinse should ensure adequate flow, washing clean before handling acceptance procedures, making acceptance record.
6, pipelines corrosion protection and thermal insulation
(1) pipeline anti-corrosion: water supply pipeline corrosion are the design requirements and national acceptance of construction, all-steel construction of the pipeline trestle and Zinc plate breakage and exposed threads to fill brush antirust paint.
(2) pipe insulation: Ming installed or concealed water pipe insulation aims: antifreeze, heat loss and preventing condensation pipe, material and thickness should be strictly in accordance with the design requirements for acceptance.
7, building water subsidiary equipment installation and quality control
(1) fire hydrants and fire hydrant Cabinet inspection should play small medal suppository valve closed flexible, close tightly and seal packing.
(2) spraying system alarm valve, valve, control valve, retarder, flow meter, water pumps and major components such as after the installation, system acceptance.
(3) alarm valve should be installed in a clear and easy-to-use exhaust devices, its height to meet the requirements, the ambient temperature not below + 5. C。
(4) after the pumps installed should Triple Guard Echinacea specification model meets the design requirements and acceptance, pump export to set slow closing check valve. Pump body shall not bear the weight of the load in the pipeline.
(5) high water tank: If there are no special requirements, should be in the main structure of the CAP in place before, in strict accordance with the design requirements for construction and installation drawings and full of water; the water test after passing the acceptance to be corrosion resistant.
(6) in winter, water, package unit should be urged to take steps to prevent Frost crack pipe.
8, finished product protection
(1) shall be installed in the pipeline or on foot to do support plate, shall not be entered after pressure, its bracket card stand for other purposes shall not be used as the focal point of the subject;
(2) pipe repair construction in insuranceProtection against spray of ash slurry or other pollutants;
(3) section of the hand wheel and installation of water meters, fire hydrant box, alarm valve parts it is necessary to pay attention to protection against damage and after sequence construction, however, have lost before reunification installed;
(4) to the main system construction is finished, all parts of the equipment attachments must have protective measures to prevent collisions and dynamic running water. Damage to the internal and external decoration of the finished product, spraying head installation nor pollution and damage to the ceiling decoration.