Piping and equipment insulation
1 scope
This applies to process standards for heating, hot water or steam pipes and equipment in life of the thermal insulation of water supply and drainage pipeline condensation heat preservation.
2 construction preparation
2.1 material requirements:
2.1.1 performance of insulation materials, specifications should comply with the design requirements, and has the certificate of approval.
Material usually used are:
2.1.1.1 precast segment: foam concrete, perlite, vermiculite, asbestos tile, etc.
2.1.1.2 shell products: rock wool, mineral wool, glass wool, polyurethane foam, polystyrene foam plastic shell, etc.
2.1.1.3 coil: is there a polystyrene foam plastic, rock wool, etc.
2.1.1.4 other materials: galvanized iron wire mesh, asbestos cement, or use the above laying or prefabricated plate bonding, etc.
2.1.2 to protect shell material with hemp fiber and plaster or asbestos and cement, hemp fiber; Glass wool cloth, plastic sheeting, immersion oil bitumen sacking, linoleum, industrial cloth, aluminum foil, and tin.
2.2 the main equipment:
2.2.1 equipment: grinding wheel saws, electric welding machine.
2.2.2 tools: steel, cloth scissors, hammer, cut, curved hook, shovels, ash bucket, flat float, arc float.
2.2.3: other steel tape, steel needle, on foot, wedge feeler, etc.
2.3 operation conditions:
2.3.1 pipeline and equipment should be in anticorrosion and heat preservation of the hydrostatic test qualified rear can be carried out, if you need to do first insulation, pipe interface and welds shall be set aside, after waiting for hydrostatic test qualified, then interface heat preservation.
2.3.2 the condole top of buildings and needs to be done within the tube well thermal insulation pipe, must in the corrosion test qualified, heat preservation complete inspection qualified after Cain, civil engineering can finally closed, it is strictly prohibited to reverse the process of construction.
2.3.3 insulation before cooking must be the cleaning to clean inside the tube Wells, the construction process of legacy of sundry, should clean up at any time, ensure smooth gutter.
2.3.4 mortar shell wet operations, in winter when antifreezing measures.
3 operation process
3.1 process:
3.1.1 precast segment:
Tile to broken galvanized steel wire, and ash to wipe filling material, the tile - wiring -
Caulking and protect shell
3.1.2 shell products:
The loose tube and shell - alloy shell - bound up protection shell
3.1.3 bound up insulation:
The cutting material - bound up heat preservation material - bandaging protective layer
3.1.4 equipment and heat preservation box tank steel net asbestos ashes
Welding hook nail - brush oil - binding wire mesh to wipe the asbestos dust, protective layer
3.2 all kinds of prefabricated segment to the construction site, along the pipeline are scattered watt-hour must ensure that the specifications of the segment size to fit of the pipe diameter.
3.3 when installing insulation tile, tile inside should be 5 ~ 10 mm of asbestos plaster, as a filling material. Segment of the longitudinal seam meet stagger, joints should be toward the top and bottom.
3.4 precast segment according to the diameter size of 18 ~ 20, galvanized steel wire for binding, fixed, binding joint shoulds not be too long, and insert the connector in the segment.
3.5 precast segment after the binding, asbestos dust mud cracks in filling, jointing screeding.
3.6 outer protective with asbestos cement (the ratio of asbestos cement, cement = 3, 7) according to the regulations of design thickness screeding calender, design rules, its thickness is 10 ~ 15 mm.
3.7 vertical pipe insulation, its height is less than or equal to 5 m, each layer should be set up a support tray, the height is greater than 5 m, each layer shall be not less than 2, support tray shall be welded on the pipe wall, its location should be 200 mm on the upper vertical pipe clamp place, the tray diameter is not more than the thickness of insulation layer.
3.8 piping fittings of thermal insulation in addition to cold area overhead pipeline and indoor outdoor flanges, valves and other accessories of the condensation heat preservation heat preservation, according to design requirements usually flange, valve, such as casing expansion should not heat preservation, and should be 70 ~ 80 mm on both sides of the gap, at the end of heat preservation with 60 ° ~ 70 ° slope. Equipment manhole, hand hole on the container and removable parts
3.11 insulation layer with a tube and shell products and its operation method generally by two people, one seam cut open the bag on the tube, pipe shell hands squeeze, another bound up protection shell, bound up with the strength should be uniform, pressure of crop to level off, the thickness should be consistent.
If use sealing side of glass cloth for protection shell, burrs to fold, shall not be exposed.
3.12 massive heat preservation heat preservation material used to bind type (e.g., polyethylene foam), set aside grounds allowance in accordance with the pipe diameter, material cutting is good, in order to ensure its smooth and beautiful, the general should be left the grounds at inside of the pipe, other requirements with 3.11.
For thermal insulation layer, and has certain strength, wipe again protect shell, requirements apply light pressure.
4 quality standards
4.1 ensure projects:
Strength, bulk density and thermal conductivity of insulation materials, specifications, and heat preservation practice should comply with the design requirements and construction norms.
Inspection method: inspect insulation materials factory certificate and instruction manual.
4.2 the basic items:
Insulation layer on the surface level off, the approach is correct, reasonable grounds, tight sealing, no empty drum and loose.
Inspection method: to observe the examination.
4.3 allowable deviation projects:
Allowable deviation - 42 projects are shown in table 1.
Insulation allowable deviation - 42 in table 1
Project allows deviation (mm) test method
+ 0.1 the delta
0.05 the delta amount check with steel needle stab into the insulation layer and ruler
Surface roughness coil or sheet in 2 m by 5 feet and wedge feeler check
Apply or other 10
Note: the delta for the insulation layer thickness.
5 finished product protection
5.1 insulation of pipeline and equipment, must be in the gutter and tube Wells has been cleaned up, there is no longer under the premise of damage to the thermal insulation layer of next working procedure, can heat preservation.
5.2 general pipe insulation should be in the water pressure test, corrosion has ended before construction, can't reverse the process.
5.3 insulation materials enter the site shall not be rain or stored in damp places.
After 5.4 insulation broken material, shall be responsible for the construction team to clean.
5.5 with the pipe insulation, civil if guniting, shall have the relevant measures to prevent pollution.
5.6 if there are special circumstances need to remove the insulation pipe processing or other type of work in the construction of damage to the thermal insulation layer, should be timely repair according to the requirements of the original.
6 should pay attention to quality problems
6.1 heat preservation material use improper disclosure practice is unknown. Should be familiar with drawings, understand the design requirements, are not allowed to do STH without authorization changes heat preservation, in strict accordance with the design requirements for the construction.
Not according to the requirement of design of insulation layer thickness of 6.2 construction. Mainly construction, with experience of deep understanding of heat preservation requirements.
6.3 rough surface is not beautiful. Mainly operating not serious, is not strict.
6.4 empty drum, loose not tight. The main reason is that heat preservation material size not appropriate, bound up with non-uniform hard, grounds position is not reasonable.
7 should possess the quality of the record
7.1 insulation materials and accessory materials should have the factory certificate.
7.2 approach should be acceptance record, its performance, the specification should meet the design requirements.
7.3 insulation pipeline and equipment should be hidden check before acceptance records.
7.4 after the completion of the heat preservation should be acceptance record.
1 scope
This applies to process standards for heating, hot water or steam pipes and equipment in life of the thermal insulation of water supply and drainage pipeline condensation heat preservation.
2 construction preparation
2.1 material requirements:
2.1.1 performance of insulation materials, specifications should comply with the design requirements, and has the certificate of approval.
Material usually used are:
2.1.1.1 precast segment: foam concrete, perlite, vermiculite, asbestos tile, etc.
2.1.1.2 shell products: rock wool, mineral wool, glass wool, polyurethane foam, polystyrene foam plastic shell, etc.
2.1.1.3 coil: is there a polystyrene foam plastic, rock wool, etc.
2.1.1.4 other materials: galvanized iron wire mesh, asbestos cement, or use the above laying or prefabricated plate bonding, etc.
2.1.2 to protect shell material with hemp fiber and plaster or asbestos and cement, hemp fiber; Glass wool cloth, plastic sheeting, immersion oil bitumen sacking, linoleum, industrial cloth, aluminum foil, and tin.
2.2 the main equipment:
2.2.1 equipment: grinding wheel saws, electric welding machine.
2.2.2 tools: steel, cloth scissors, hammer, cut, curved hook, shovels, ash bucket, flat float, arc float.
2.2.3: other steel tape, steel needle, on foot, wedge feeler, etc.
2.3 operation conditions:
2.3.1 pipeline and equipment should be in anticorrosion and heat preservation of the hydrostatic test qualified rear can be carried out, if you need to do first insulation, pipe interface and welds shall be set aside, after waiting for hydrostatic test qualified, then interface heat preservation.
2.3.2 the condole top of buildings and needs to be done within the tube well thermal insulation pipe, must in the corrosion test qualified, heat preservation complete inspection qualified after Cain, civil engineering can finally closed, it is strictly prohibited to reverse the process of construction.
2.3.3 insulation before cooking must be the cleaning to clean inside the tube Wells, the construction process of legacy of sundry, should clean up at any time, ensure smooth gutter.
2.3.4 mortar shell wet operations, in winter when antifreezing measures.
3 operation process
3.1 process:
3.1.1 precast segment:
Tile to broken galvanized steel wire, and ash to wipe filling material, the tile - wiring -
Caulking and protect shell
3.1.2 shell products:
The loose tube and shell - alloy shell - bound up protection shell
3.1.3 bound up insulation:
The cutting material - bound up heat preservation material - bandaging protective layer
3.1.4 equipment and heat preservation box tank steel net asbestos ashes
Welding hook nail - brush oil - binding wire mesh to wipe the asbestos dust, protective layer
3.2 all kinds of prefabricated segment to the construction site, along the pipeline are scattered watt-hour must ensure that the specifications of the segment size to fit of the pipe diameter.
3.3 when installing insulation tile, tile inside should be 5 ~ 10 mm of asbestos plaster, as a filling material. Segment of the longitudinal seam meet stagger, joints should be toward the top and bottom.
3.4 precast segment according to the diameter size of 18 ~ 20, galvanized steel wire for binding, fixed, binding joint shoulds not be too long, and insert the connector in the segment.
3.5 precast segment after the binding, asbestos dust mud cracks in filling, jointing screeding.
3.6 outer protective with asbestos cement (the ratio of asbestos cement, cement = 3, 7) according to the regulations of design thickness screeding calender, design rules, its thickness is 10 ~ 15 mm.
3.7 vertical pipe insulation, its height is less than or equal to 5 m, each layer should be set up a support tray, the height is greater than 5 m, each layer shall be not less than 2, support tray shall be welded on the pipe wall, its location should be 200 mm on the upper vertical pipe clamp place, the tray diameter is not more than the thickness of insulation layer.
3.8 piping fittings of thermal insulation in addition to cold area overhead pipeline and indoor outdoor flanges, valves and other accessories of the condensation heat preservation heat preservation, according to design requirements usually flange, valve, such as casing expansion should not heat preservation, and should be 70 ~ 80 mm on both sides of the gap, at the end of heat preservation with 60 ° ~ 70 ° slope. Equipment manhole, hand hole on the container and removable parts
3.11 insulation layer with a tube and shell products and its operation method generally by two people, one seam cut open the bag on the tube, pipe shell hands squeeze, another bound up protection shell, bound up with the strength should be uniform, pressure of crop to level off, the thickness should be consistent.
If use sealing side of glass cloth for protection shell, burrs to fold, shall not be exposed.
3.12 massive heat preservation heat preservation material used to bind type (e.g., polyethylene foam), set aside grounds allowance in accordance with the pipe diameter, material cutting is good, in order to ensure its smooth and beautiful, the general should be left the grounds at inside of the pipe, other requirements with 3.11.
For thermal insulation layer, and has certain strength, wipe again protect shell, requirements apply light pressure.
4 quality standards
4.1 ensure projects:
Strength, bulk density and thermal conductivity of insulation materials, specifications, and heat preservation practice should comply with the design requirements and construction norms.
Inspection method: inspect insulation materials factory certificate and instruction manual.
4.2 the basic items:
Insulation layer on the surface level off, the approach is correct, reasonable grounds, tight sealing, no empty drum and loose.
Inspection method: to observe the examination.
4.3 allowable deviation projects:
Allowable deviation - 42 projects are shown in table 1.
Insulation allowable deviation - 42 in table 1
Project allows deviation (mm) test method
+ 0.1 the delta
0.05 the delta amount check with steel needle stab into the insulation layer and ruler
Surface roughness coil or sheet in 2 m by 5 feet and wedge feeler check
Apply or other 10
Note: the delta for the insulation layer thickness.
5 finished product protection
5.1 insulation of pipeline and equipment, must be in the gutter and tube Wells has been cleaned up, there is no longer under the premise of damage to the thermal insulation layer of next working procedure, can heat preservation.
5.2 general pipe insulation should be in the water pressure test, corrosion has ended before construction, can't reverse the process.
5.3 insulation materials enter the site shall not be rain or stored in damp places.
After 5.4 insulation broken material, shall be responsible for the construction team to clean.
5.5 with the pipe insulation, civil if guniting, shall have the relevant measures to prevent pollution.
5.6 if there are special circumstances need to remove the insulation pipe processing or other type of work in the construction of damage to the thermal insulation layer, should be timely repair according to the requirements of the original.
6 should pay attention to quality problems
6.1 heat preservation material use improper disclosure practice is unknown. Should be familiar with drawings, understand the design requirements, are not allowed to do STH without authorization changes heat preservation, in strict accordance with the design requirements for the construction.
Not according to the requirement of design of insulation layer thickness of 6.2 construction. Mainly construction, with experience of deep understanding of heat preservation requirements.
6.3 rough surface is not beautiful. Mainly operating not serious, is not strict.
6.4 empty drum, loose not tight. The main reason is that heat preservation material size not appropriate, bound up with non-uniform hard, grounds position is not reasonable.
7 should possess the quality of the record
7.1 insulation materials and accessory materials should have the factory certificate.
7.2 approach should be acceptance record, its performance, the specification should meet the design requirements.
7.3 insulation pipeline and equipment should be hidden check before acceptance records.
7.4 after the completion of the heat preservation should be acceptance record.
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