The horizontal pipe of indoor gas pipeline should be buried in the wall below 20 cm from the ceiling and 50 cm from the ground. After being buried, there should be obvious signs to prevent users from damaging the buried gas pipeline during decoration and construction.

When crossing the floor, landing, etc. The casing shall be made of steel pipe, and the diameter of the casing shall not be less than that specified in table 1. The upper end of the casing should be 60 mm-90 mm higher than the gross ground, 30 mm-50 mm higher than the decorative ground, and the lower end should be flat with the floor. Casing and gas pipe shall be sealed with flexible waterproof material, and the casing and ground shall be firm.

Requirements for installation height of internal gas horizontal pipeline: (except when installing low hanging meter)

(1) should be no less than 2.20m in the stairwell;

(2) In the kitchen, it shall be no less than1.80m; ;

(3) The clear distance from pipes and accessories to the roof should not be less than 100mm, and fire prevention measures must be taken for the kitchen roof.

Gas risers in high-rise buildings should have load-bearing support measures, and measures should be taken to eliminate the additional pressure of gas when low-pressure gas is supplied.

Clear distance between indoor gas pipeline and wall:

Dn < 25mm (1 ") should not be less than 30mm；;

Dn 25 mm-50 mm (1 "-2 "), not less than 60mm；;

When DN > 50 mm (2 "), it should not be less than 90mm or determined according to the pipeline installation.