1. The gas pipeline shall be laid along the wall surface of non-combustible materials. When meeting with other pipelines, the following requirements shall be met: (1) The net distance shall not be less than 150mm when laying horizontally in parallel; (2) The net distance when laying in parallel Should not be less than 100mm, and should be located on the outside of other pipes; (3) The cross-laying, the net distance should not be less than 50mm. 2. Special circumstances When the indoor gas pipeline must pass through the bathroom, toilet, ceiling (vertical wear) and living room, the pipeline should have no interface. 3, indoor gas pipe should not cross below the bucket. When it is necessary to cross, additional casing should be installed. The diameter of the casing pipe should be larger than that of the gas pipe. The gas pipe and the casing should have no interface. Both ends of the casing should extend 20 to 20 mm from the side of the water bucket. 4. The tightness test shall be made after the installation of the gas pipeline. The test pressure shall be 300mm water column, and the pressure shall not fall to be qualified within 3 minutes. 5, burning appliances and electric meters, electrical equipment should be set in the wrong position, the level of the net distance must not be less than 500mm. When it can not be dislocated, there should be thermal protection measures. 6. Fireproof measures must be taken when the wall surface of the burning appliance is in wood or other flammable materials. 7. The distance between the sides of various types of burning appliances and walls, buckets, door frames, etc. and the distance between burning appliances and burning appliances should not be less than 200mm. When the two burning appliances or a burning appliance and water bucket are arranged at right angles, the sum of the two sides of the inlet and outlet walls shall not be less than 1.2m. Living room bathroom layout appliance toilet door Carbide Burrs,Rotary Bur,Double Cut Bur Drilling bits Mining bits,Carbide Inserts Co., Ltd. , http://www.nscarbide.com