1 building drainage system 1.1 Basic definitions inspection port (check hole, check pipe) with openable inspection cover parts, mounted on risers and a longer horizontal drainage pipe section, for inspection and cleared through use. 1.2 Installation Requirements checkpoints generally installed on the riser, for risers and horizontal branch pipe connection when there blockage Qingtao use, it should be installed on every layer of the multilayer high-rise building or a drainage standpipe, inspection openings spaced not greater than 10m. But at the bottom and with a plumbing fixture over the top of a hill two buildings must be set to check the mouth, flattened buildings can be used instead of checking the vent opening. In addition, the riser pipe B word if fitted, should be set up checkpoints in the upper pipe B word. When the drain pipe exceeds the horizontal branch lengths should also be set up checkpoints. Checkpoints set the height from the ground to the general inspection port center 1m appropriate. 2 foreign trade transportation checkpoints refers Truck hauling container out of the container terminal necessary place, container terminal box and drag me people exchange, an important business document processing and information recording! Hebei Yongsheng Industrial Park plant parts production and sales in North China miscellaneous piping assembly plants specialized factory of the company has the advanced production line is the production of D-LD2000 coal smoke wind pipeline components series, 02S403 02S404 National Building Standard Design of steel fittings, GD87 thermal power plant steam piping parts and components, GD2000 miscellaneous pipe fittings, petrochemicals accessories, chemical components, transportation equipment, plumbing products, metallurgy and petroleum and other industries. Hanger (Northwest Hospital standard, HG / T21629-1999 etc.) plant miscellaneous (GD87, GD2000, etc.) coal smoke wind pipeline components (74DD, D-LD2000, etc.) waterproof casing, water bell and bracket (02S403, 02S404, etc.) all kinds of manholes, hand holes (74DD, D-DL2000, HG / T21514-21535 etc.) all kinds of difficult pieces. Welcome new and old customers to visit and cooperation and win-win! The following is our products: coal mixer, [feed pump (inlet, import) filter], [(rigid, flexible) waterproof casing], [(single-stage, multi-level) orifice plates], [ (elbow type, cover type) snorkel], [flow indicator (flange, threaded, threaded)], [(round, square) throttle], [(bidirectional, three-way) shift indicator], [ (round, slope, gravity) proof door], [filter (T-type, Y-type, basket)], [manhole (circular, insulation, quick open, rectangle)], [drainage funnel (HGS07 standards, S5-6-1 standard, GD87 / 2000 standard)], [suction bell, suction tube speaker, suction tube speaker stand], air defense hat, rain hat, creeping inflation measurement points, high temperature throttle lever, hydrophobic collector, hydrophobic plate, pour sparse, swing blocking plate, butt plug, 8-word blind plate, hemispherical dome, clean mouth, inspection port, water bucket, mirrors, floor drain, metal hose, tube clamp / pipe clamp / holder , quick connectors, flow measurement orifice welded flange assembly, pad ring flange assembly, insulating flange insulation joints, pipe flame arrester, current limiting orifice, reinforcing rings, valve gear sprocket to pump again loop multi-level throttling device / flange, size, head, elbow and other quality products. I always adhere to the "loyal and trustworthy customer service, quality brand contributing to society," the quality policy, the establishment of a sound marketing system, the business elite distribution throughout the country, has petrochemical, power, chemical, shipbuilding, pharmaceutical, paper and other national key projects project to provide high-quality products and first-class service and get good praise. Customer demand is our pursuit