Cad of common pipe accessories for classic water supply and drainage and environmental protection a design chart Set (including design description)
Cad design atlas of classic water supply, drainage and environmental protection pipeline accessories (including design instructions); Including: design description, drawing list, reinforced concrete cover slab brick culvert drawing (covering depth H=1.0m), diversion shaft (I) reinforced concrete cover slab reinforcement drawing, drainage ditch grid detail drawing, rubber hose and metal pipe connection flange joint drawing, brick rectangular open channel drawing, etc; 1. All dimensions in the drawing are in mm except elevation, coordinate, pipe length and those indicated in m 2. The elevation of pressure pipe refers to the pipe center, the elevation of indoor gravity flow pipe refers to the pipe center, and the elevation of outdoor gravity flow (drainage pipe and rainwater pipe) refers to the pipe bottom 3. Indoor production water supply pipe, return pipe and drainage pipe with DN<70mm shall be galvanized steel pipe, threaded connection or flange connection; pipes with DN>70mm shall be welded steel pipe, welded or flange connection; outdoor production water supply pipe and return pipe with DN>75mm shall be water supply socket cast iron pipe (asbestos cement interface or rubber ring interface) or welded steel pipe (welded connection); Pipes with DN<75mm shall be galvanized steel pipes with threaded connection. Indoor domestic and fire water supply pipes, reclaimed water pipes and indoor and outdoor hot water pipes shall be galvanized steel pipes with threaded or non threaded connection. Outdoor domestic and fire water supply pipes, reclaimed water pipes with DN<75mm shall be galvanized steel pipes with threaded connection. Pipes with DN>75mm shall be water supply socket cast iron pipes, asbestos cement interfaces or rubber ring interfaces Indoor drainage pipes shall be cast iron drainage pipes (asbestos cement joints or cement mortar sealing) or plastic drainage pipes (bonding or threaded connection); Outdoor drainage pipes shall be reinforced concrete pipes or concrete pipes, sealed with cement mortar or filled with asphalt mortar. Outdoor rainwater pipes shall be reinforced concrete pipes. If plastic pipes are used, they shall be bonded or threaded If there are special requirements for the above pipe materials, the project design shall prevail 4. Before painting the primer, the dust, dirt, rust spot, welding slag and other substances on the surface of the pipeline must be removed. The paint shall be painted in uniform thickness, without peeling, bubbling, flowing and missing coating Exposed pipes, vessels and equipment shall be painted with two coats of antirust paint (except for galvanized steel pipes, but including the damaged part of the galvanized layer and the exposed part of the pipe thread), with two coats of paint. The finishing paint of each pipe is: the finishing paint of the circulating cooling water supply pipe is green ready mixed paint; The top coat of circulating cooling return pipe is blue ready mixed paint; The finish of production water supply pipeline is gray ready mixed paint; The exposed galvanized steel pipes in civil buildings, and the containers and equipment are painted with two layers of silver powder; In the warehouse, the finish paint shall be two layers of gray lead oil; Concealed pipes, containers and equipment shall be painted with two layers of anti rust paint; Steel pipes buried in soil shall be painted with one coat of anticorrosive paint, two coats of asphalt paint and one coat of glass fiber cloth, with thickness>3mm. Cast iron pipes and pipe fittings for water supply and drainage shall be coated with two coats of asphalt paint 5. Supports and buttresses shall be set at the turning of horizontal installation of pipes, where there are heavy valves, equipment, instruments and other places on the pipes. The spacing of supports for horizontal installation of steel pipes shall not be greater than that specified in the following table When the floor height of the steel pipe riser clamp is less than 5 m, one clamp shall be installed on each floor, and when the floor height is more than 5 m, there shall be at least two clamps on each floor. The installation height of the first clamp shall be 1.5~1.8 m from the ground. The spacing between the fasteners on the drainage cast iron pipe: the horizontal pipe shall not be more than 2 m, and the riser shall not be more than 3 m. When the floor height is less than or equal to 4 m, The riser can be installed with one fastener. The elbow at the bottom of the riser shall be provided with buttress. See national standard S161 for pipe support and hanger
