5.
The pipe supports and hangers fixed on the building structure shall not affect the safety of the structure.
When the supervision engineer is not on site, the construction unit shall be notified.
2.
Seamless steel pipe; 3.
The casing pipe diameter shall be 1 ~ 2 larger than that of the main pipe and riser passing through the wall panel.
The specific conditions are as follows: cold and hot water pipe: the material of air conditioning cold and hot water pipe shall be determined by the owner or user: 1.
The wall thickness of water pipes shall meet the following standards: 8.
3.
The casing through brick masonry shall be placed in time in cooperation with civil engineering.
Threading: before mechanical threading, try to buckle with the pipe fittings.
Fabrication and installation of pipe support 1.
There is no quality problem, the conclusion is qualified, and it is agreed to enter the site for installation; If there are quality problems, carefully fill in the quality problem feedback form, indicate the severity of the problem, analyze the causes, and put forward solutions.
L1 is used for insulated pipes and L2 is used for uninsulated pipes.
Larger steel can be cut with oxyacetylene.
“Three certificates are complete” (brand / manufacturer, certificate number, production license number and product inspection report number).
“Three certificates are complete” (brand / manufacturer, certificate number, production license number and product inspection report number).
3.
The power line generally adopts bv line, BVR line or VV cable, and its electrical technical indexes and flame retardant performance shall meet the national standards and design requirements.
5.
After cutting, the oxide scale and burr should be removed.
Equipment mobilization: 1.
Opening: the opening shall be processed by electric drill, and oxyacetylene cutting is not allowed.
It is applicable to the pipeline system with working pressure not greater than 2.0MPa, no insulation or insulation material density not greater than 200kg / m3.
2.
Insulation layer clearance shall be reserved for the casing of insulation pipeline.
The pipe has uniform wall thickness, smooth surface, no obvious shrinkage, scratch and other phenomena.
Blanking: use the same steel disc ruler as the surveying and mapping, subtract the length of pipe fittings in the pipe section, and add the size of internal thread screwed into the pipe fittings to give the cutting edge value.
2.
Pipe prefabrication: 1.
Whether the package is intact and damaged.
3.
There shall be no obvious aging on the surface of rubber and plastic insulation materials.
“Three certificates are complete” (type, cross-sectional area, brand / manufacturer, certificate number, production license number and safety test report number).
4.
2.
Construction of air conditioning water pipeline: pipeline supports and hangers: maximum spacing of PPR pipeline hangers (mm) Note: in actual installation, due to aesthetic factors, when cold and hot water pipes are installed side by side, the smaller value in the table shall be taken.
Numbering and binding: check and number the prefabricated parts one by one with the processing sketch, and keep them properly.
Thermal insulation materials: 1.
Galvanized iron sheet casing is applicable to wall crossing branch pipes.
The incoming equipment shall be subject to sampling inspection in batches and models.
4.
The acceptance record and inspection record shall record in detail whether the outer packaging of the equipment is wood or paper.
The air conditioning air outlet materials mainly include aluminum alloy air outlet, wooden air outlet, plastic air outlet, etc.
2.
The casing shall be filled with loose materials to prevent the casing from being blocked during concrete pouring.
Blanking: generally, the blanking of the support should be cut with a grinding wheel cutter.
2.
The supervision engineer must be on site during sampling inspection.
Water stop ring shall be added to the casing with waterproof requirements, and the specific method shall refer to atlas S312.
For the casing passing through the floor, the gap between the casing and the pipe shall be filled and closed with hemp and waterproof ointment, and the wall casing can be filled with asbestos rope.
Assembly and spot welding: the assembly shall be carried out according to the processing details, and shall be corrected while assembly, spot welded and connected until forming..
2.
The cross-sectional area and current of the power line shall ensure 1.5 times of the maximum working current of the equipment.
3.
Mobilization of engineering materials: strengthen the mobilization inspection of materials, and effectively control and test the mobilized materials, so as to prevent quality and safety accidents and ensure the project quality.
2.
3.
7.
Straightening: before straightening, fix the relevant pipe fittings before straightening.
The thickness of galvanized steel plate shall comply with the following table: the thickness of galvanized steel plate for air duct (mm) Note: 1) the thickness of steel plate for spiral air duct can be appropriately reduced by 10% ~ 15%; 2) The steel plate thickness of the air duct of the smoke exhaust system can be calculated according to the high-pressure system; 3) The thickness of air duct steel plate of special dust removal system shall meet the design requirements; 4) It is not applicable to the embedded pipe of underground civil air defense and fire partition wall.
It is required to roll neatly, bite joints, flush both ends of the casing, remove burrs, and prevent corrosion inside and outside the pipe.
The casing shall be installed firmly, correctly and without skew.
4.
Copper tube; 6.
The thermal insulation materials of chilled water pipes and condensate pipes mostly adopt rubber and plastic thermal insulation pipes, and the air pipes adopt rubber and plastic plates.
Remove hemp (asbestos rope): cut off the hemp head at the screw thread joint with a broken saw blade, and then remove it with a cloth strip.
Galvanized steel pipe; 4.
The power line of the indoor unit shall strictly refer to the product manual.
3.
The thickness of rubber and plastic insulation materials shall meet the requirements in the following table: the minimum thickness of rubber and plastic insulation of air conditioning cold and hot water pipes: galvanized steel plate: 1.
Casing installation: the casing located in the concrete wall and slab shall be placed during reinforcement binding, and can be spot welded or bound on the reinforcement.
2.
The power line and signal line are qualified products of the national regular cable factory.
The internal and external surfaces of water pipes shall be smooth and free from defects, holes, cracks, scabs, spalls or bubbles.
If there is a problem with the equipment and the words are not clear, photos can be used for explanation.
The drilled hole diameter shall be about 2mm larger than the diameter of the pipe clamp.
Air conditioning equipment is the heart of the whole air conditioning system.
3.
The wall thickness of U-PVC pipe shall meet the following standards: power line and signal line: 1.
6.
Casing fabrication and installation: 1.
Inspection results of air conditioning equipment: classify and sort according to different equipment types, fill in the quantity and factory number of various equipment, and check the quality problems.
Therefore, the mobilization acceptance of air conditioning equipment shall be well done, and the acceptance record form shall be carefully filled in to prevent the mobilization of air conditioning equipment with quality problems.
If there are quality problems in the equipment, the construction unit shall timely notify the supervision engineer to deal with them.
The material selection of thermal insulation materials for air conditioning cold and hot water pipes shall be determined by the owner or the user: Rubber and plastic thermal insulation materials; “Three certificates are complete” (brand / manufacturer, certificate number, production license number and product inspection report number).
After the materials are in place, the construction management personnel shall inspect the mobilized materials, including: material manufacturer, brand, specification and model, quantity, appearance, material certification documents, etc.
4.
Thread processing: the threads of suspenders, pipe clamps and other parts can be processed by lathe or manually pulled by circular die.
Ordinary welded steel pipe; 2.
3.
Generally, U-PVC pipes, galvanized steel pipes and PP-R pipes can be used for condensate pipes.
Name and quantity of attached accessories, whether there are missing parts, name and quantity of missing parts, and analyze the reasons.
after passing the acceptance, fill in the relevant record account.
The material surface shall be flat and smooth, with crystalline patterns of galvanized layer, uniform thickness, and no serious corrosion, crack, scar and other defects.
The material, capacity, moisture content, thermal conductivity, fire resistance and other indexes of the material shall meet the requirements of national standards.
Length of casing: length of casing passing through the wall = wall thickness + plastering thickness on both sides of the wall; length of casing passing through the floor = floor thickness + plastering thickness at the bottom of the slab + plastering thickness on the ground + 20mm (30mm in the toilet).
5.
PP-R pipe; 5.
When tearing with force, it shall not be easily torn.
4.
“Three certificates are complete” (brand / manufacturer, certificate number, production license number and product inspection report number).
Air conditioning air outlet: the surface of air conditioning air outlet shall be flat, the lines shall be clear, there shall be no distortion, diameter change, corner and joint shall be connected naturally without obvious gap.
The quality of equipment directly affects the use effect of the whole air conditioning system.
During the unpacking inspection of the equipment, check whether the equipment accessories are complete and whether there is oil leakage and damage.
Maximum spacing of steel pipe hangers note: 1.
Condensate pipe: the material of condensate pipe can be galvanized steel pipe, PP-R pipe and PVC pipe; 1.
4.
Conclusion: the corresponding acceptance conclusion is obtained through the mobilization acceptance of air conditioning equipment.
3.
