1) Thin-walled stainless steel pipes and fittings should not be in direct contact with cement, cement mortar, and concrete. When the pipeline is concealed, anti-corrosion tape should be wrapped around the outer wall of the pipe or plastic-coated thin-walled stainless steel pipe should be used.
2) When cement mortar is used to fill concealed pipes, insulation materials should be used to ensure that there is a gap between the cement mortar and the stainless steel pipe. So that the concealed stainless steel tube can be freely expanded and contracted.
3) Plastic-coated thin-walled stainless steel (type 316) pipes should be used for burial to avoid acid and alkali corrosion on the outer wall of the pipe or damage to the pipe by sharp and hard debris. Other wrapping materials can also be used for anti-corrosion measures, such as wrapping with two layers of polyethylene tape or two layers of vinyl chloride tape, wrapping with two layers of asphalt paint (or epoxy resin), and fiberglass plastic cloth for anti-corrosion.
4) The pipeline should be reasonably equipped with telescopic compensation devices and brackets (fixed brackets and movable brackets) to control the telescopic direction or compensation of the pipeline. When the straight length of the thin-walled stainless steel pipe for hot water exposed or not buried exceeds 10~15m, axial compensation measures should be taken. When the nominal diameter is greater than 50mm, stainless steel corrugated expansion joints or stainless steel linear temperature compensators should be installed.
5). Condensation prevention measures should be taken for thin-walled stainless steel pipes for water supply in open buildings, and thin-walled stainless steel pipes for hot water should be insulated.
6) Pipes and fittings should be supplied uniformly by suppliers. Stainless steels of different grades should not be welded together.
7) Stainless steel pipes and fittings are thin-walled. When connecting to accessories such as threaded valves, water nozzles, water meters, etc., threads must not be placed on the thin-walled stainless steel pipes but should be transitioned through wire fittings such as adapters.
8) Oil pollution will cause the rubber sealing ring to deteriorate, and sharp objects will cause water leakage if they collide with the stainless steel pipes and fittings, so be sure to pay attention during construction.
9) After the pipeline is installed and the pressure test passes, it should be flushed with low chloride ion water and disinfected with 0.03% potassium permanganate aqueous solution.
10) For pipe and equipment insulation, condensation prevention, and electric heating, please refer to the national standard atlas 03S401. For indoor pipe supports and hangers, please refer to the national standard atlas 03S402 “Indoor Pipe Supports and Hangers”. The installation of indoor pipelines in civil buildings should follow the national standard diagram “Installation of Sanitary Equipment” 09S304 or “Installation of Residential Kitchen and Bathroom Water Supply and Drainage Pipes” 03SS408 Atlas or “Installation of Metal Pipes for Building Water Supply”
Post time: Oct-25-2023