Outdoor water supply pipe and equipment installation
1 scope
The technology standard is applicable to civil buildings (village), working pressure is not greater than 0.6 MPa outdoor water supply and fire fighting pipe network of water supply cast iron pipe and galvanized carbon steel pipe installation.
2 construction preparation
2.1 material equipment requirements:
2.1.1 water supply cast iron pipe and pipe fittings specifications varieties should comply with the design requirements, uniform wall thick, smooth and neat, inside and outside can not have sand holes, cracks, stab fly and bumps. Socket diameter and pipe fittings should be modelling rules, and have the factory certificate.
2.1.2 galvanized carbon steel pipe and pipe fittings pipe wall inside and outside galvanized evenly, no rust. Wall without impalement, pipe fittings unbiased clasp, buckle, square buckle, the thread is not complete, the phenomenon such as Angle is incorrect.
No crack 2.1.3 valve, switch is quick, casting rules, the handwheel no damage, and have the factory certificate.
2.1.4 hydrant, underground gate valve, water meter varieties, specifications should comply with the design requirements, and have the factory certificate.
2.1.5 twisted mouth cement commonly use should not less than 425 # silicate cement and expansive cement (in gypsum alumina expansion cement or Portland cement). The cement must have the factory certificate.
2.1.6 other materials: oil asbestos wool, hemp rope, lead, lead, twine, antirust paint, oil, bolts, nuts, etc.
2.2 the main equipment:
2.2.1 equipment: set of silk machine, grinder, grinding wheel, saw, hydraulic test pump etc.
2.2.2 tools: a hammer and chisel, hacksaw, sets of silk, chop axe, hammer, welding tools, chain hoist, the pressure case, tongs, rope, shovels, pickmattock, etc.
2.2.3: other level, steel tape, etc.
2.3 operation conditions:
2.3.1 trench straight, pipe trench depth, width, conform to the requirements, the valve well, table well cushion, fire hydrant base construction is completed.
2.3.2 trench bottom ramming, no obstacles in the ditch. And shall have the landslide prevention measures.
2.3.3 pipeline construction materials shall not be piled up on both sides, and other items.
3 operation process
3.1 process:
Installation readiness to cleaning the pipe bore, pipes, pipe fittings, valves, fire hydrant, etc in place - pipe connection -
Grey cast maintenance to water pressure test, pipeline flushing
Zinc plated carbon steel pipe installation process see 1 to 2.
3.2 according to construction drawing examination trench coordinates, the degree of depth, flat, groove jaasiel compactness meets the requirements.
3.3 pipe socket internally and externally socket fly, be off in advance, such as casting sand bitumen paint with a blowtorch or gas welding bake out, with a wire brush to remove dirt.
3.4 the valves and pipe fittings in specified position, as a reference point. The iron pipe to pipe trench along the river bank, socket toward the direction of water.
3.5 according to the iron pipe length, determine section working pit position, the work before laying pit digging a well. Working pit sizes are shown in table l - 23.
Working pit size table - 23 in table 1
Hole size (mm)
Wide diameter long degrees (m) deep
Before (m) socket socket
Diameter 0.6 0.2 0.3 + 0.6) of 75 ~ 250
More than 250 diameter 1.2 1.0 0.3 0.4 +
3.6 after cleaning with large cast iron GuanShun to ditch, clean up the socket, and then to install piping, the socket interface straight position.
3.7 installation of pipe fittings, valves, etc should be accurate location, the valve stem vertically up.
3.8 outdoor hydrant with precast concrete block or the foundation of the cast-in-place concrete cushion, the soil layer below for ramming (figure l - 41).
, after 3.9 cast iron pipe stability near the pipe ends of filled soil cover, on both sides of the compaction, and should be slightly larger than the diameter of an interface between clean with hemp rope will interface plug, prevent dirt and debris into.
3.10 the asbestos cement interface:
Should be within the socket before 3.10.1 interface oil flax, preview hemp process is as follows:
3.10.1.1 scutching when the oil hemp twist into a twist, the roughness of 1.5 times larger than the pipe orifice clearance, hemp shares by the interface below gradually to the above, the frontier and twisted chisel in turn into the gap, twisting cut back that ma was hard up, play real hemp depth should be 1/3 of the socket depth.
3.10.1.2 socket depth of cast iron tube packing are shown in table 1 to 24.
Socket depth of cast iron tube packing table table 1-24
Tube diameter interface socket interface depth of packing (mm)
Gap between the total deep asbestos cement interface lead
(mm) (mm) (mm) hemp grey hemp lead
75 10 90 33 57 40 to 50
10 95 33 62 45 50 100 ~ 125
10 100 33 67 50 50 150 ~ 200
11 105 35 70 55 50 of 250 ~ 300
3.10.2 asbestos cement twisted mouth can not be less than 425 # silicate cement, 3 ~ 4 levels of asbestos, weight ratio of water: asbestos: cement = 1:3:7. Add water weight and temperature, to appropriately increase in hot summer.
3.10.3 twist joint operation: the mixed ash from bottom to top into hemp has good oil in the socket, stuffed with twisted chisel and a hammer to packing after tamping, according to the method step by step, playing so far. When the ash recessed socket 2 ~ 3 mm, depth is consistent, at the same time feel elastic, can think that have already been laid when giving a light grey.
3.10.4 interface after the twist, the interface to be not less than 48 h of curing.
3.11 lead interface:
See the l - 2 lead interface.
3.12 aprons interface:
3.12.1 appearance inspection aprons even thickness, no bubble, no double skin.
3.12.2, according to the socket depth in pin tube drawn in conformity with the socket end clearance of not less than 3 mm, maximum clearance is not greater than the mark given in table 1 to 25. Will aprons the slots into the socket aprons and the inside aprons and socket with soap and water, will find is leveling, pipe with tools such as chain would cast iron pipe slowly inserted in the socket to mark. Annular gap socket interface can be found in the table 1-26.
Cast iron GuanCheng jack's biggest gap - 25 in table 1
Laying along a straight line pipe diameter (mm) (mm) (mm) along the curve laid
75
100 ~ 200
4 of 300 ~ 500
5
June 5
7 to 13
14 ~ 22
Cast iron GuanCheng plug interface of annular gap big table 1-26
Diameter (mm) standard annular clearance (mm) (mm) allowed deviation
75 ~ 200
200 ~ 450
500 10
11
12 + 3 to 2
+ 4
2 -
3.12.3 using asbestos cement pipes and pipe fittings joint interface.
Zinc plated carbon steel pipe laying 3.13:
Zinc plated carbon steel pipe buried laying according to design requirements and soil conditions good anticorrosive processing. Other construction process detailed in chapter 2.
Unit 3.14 meter installation:
Unit meter installed in the center of the table bottom hole (see photo, l - 42).
Sprinkler bolt installation as shown in figure 3.15 l - 43.
3.16 hydraulic pressure test:
Should carry on the water pressure test, has installed the pipe test pressure value according to the requirements of design and construction shall be defined by the specification.
3.17 pipe flushing:
Pipe installation should be done before acceptance, rinse, the clean water quality to specified purchase requirements. Please related departments acceptance, make a good record of pipe flushing acceptance.
4 quality standards
4.1 ensure projects:
4.4.1 buried pipeline laying pipeline and aerial pipeline hydraulic pressure test result, must comply with the design requirements and the rules and regulations of construction.
Inspection method: inspect pipe network or segmented test record.
4.1.2 pipe and pipe support (block), it is forbidden to lay on the permafrost and untreated scarification.
Methods: to observe the inspection or check the concealed work record.
4.1.3 water supply pipe network before the completion inspection and acceptance, must be to wash system.
Inspection method: inspect irrigation records.
4.2 the basic items:
2 that the slope of the pipe should be consistent with the design requirements.
Testing method: use level (level), stay, and feet quantity check or check measurement record.
4.2.2 metal pipe socket and ferrule interface structure and the packing should comply with the rules and regulations of the design requirements and construction. Grey cast close-grained, full, level off, smooth, uniform circular seam gap, grey cast maintenance good, packing recessed socket edge is not greater than 2 mm, aprons interface flat, without distortion, end clearance accurately, aprons interface rebound clearance comply with the design requirements.
Inspection method: to observe the feet and check.
Holdings of galvanized carbon steel pipe of threaded connection quality requirements: threaded pipe thread machining accuracy, comply with the regulations of the international journal of pipe thread, thread clean, neat, no broken wires, the connection is firm, galvanized carbon steel pipe and pipe fittings galvanized layer without damage, thread showing a good corrosion resistance, joints have no visible defects such as hemp oil. Zinc plated carbon steel pipe welding mouth.
Test method: observation or the collapse of the check.
4.2.4 galvanized carbon steel pipe flange connection: requirements for docking parallel, close together, with the center line of the vertical pipe, the screw nut same length, and is not more than 1/2, screw diameter nut on the same side, liner material conform to the requirements of the design and construction rules.
Inspection method: to observe the examination.
4.2.5 pipe (,) and the installation of the tube holder (block) : requirements to construct correct, buried a right and firm, neat rows, close contact with the pipe.
Inspection method: to observe the feet and check.
4.2.6 valve installation quality requirements to type, specification, compression strength and leak test results comply with design requirements and construction specifications, location, import and export in the right direction, firm connection, closely. Opening and closing flexible, toward the reasonable, surface clean.
Inspection method: arbor inspection and check the factory certificate, test list.
4.2.7 buried pipeline coating quality requirements to comply with the design requirements and construction materials and structure rules, coil and pipe and pasted firmly between the layers of coil. Surface smooth, no crease, empty drum, defects such as sliding and sealing is lax.
Test method: to observe the cut or coating inspection.
4.2.8 pipes and metal stents coating types and quality requirement to paint besmear brushs times comply with the design requirements, good adhesion, without peeling, blister and the coating. Film thickness uniformity, colour and lustre is consistent, no flow and pollution.
Inspection method: to observe the examination.
4.3 allowable deviation projects:
Outdoor water supply pipe installation of allowable deviation and inspection methods shall comply with the requirements of table 1-27.
5 finished product protection
5.1 water supply cast iron pipe, pipe fittings, valves and fire hydrant, put to avoid collision damage.
5.2 fire hydrant and table well to build by laying bricks or stones good in time, to ensure that the pipe after installation from being damaged.
5.3 buried pipe to avoid deformation and damage caused by outside load, try after the water to drain in time, prevent cold.
5.4 to get casing pipe wear railway, highway foundation.
5.5 backfill soil, underground pipes to prevent displacement of the center line of the pipeline or damage to the pipe, the first application of artificial fill compaction around the pipe, and should have been done on both sides of the pipe at the same time, until the pipe top 0.5 m above, under the condition of without causing damage to pipeline, before the breaststroke ramming tamping taxes.
5.6 in the process of pipeline installation, pipeline before twisting mouth to interface to do temporary plugging, lest dirt into the pipeline.
6 should pay attention to quality problems
6.1 buried pipeline rupture. The reason is: jaasiel processes is not good, or improper fill compaction method.
Give way to install this camp outside the allowable deviation and inspection method of table 1-27
Will project allowable deviation (mm) test method
1 coordinates cast iron pipe buried
Laying 50 in the groove
20
With a spirit level,
Carbon steel pipe buried
Lay in the grooves and aerial 40
15 straight edge, pull
Feet and check
Level 2 cast iron pipe buried
Laying plus or minus 30 in the groove
Plus or minus 20
Carbon steel pipe buried
Laying in the groove + 15
Plus or minus 10
The level of
Every 1 m pipe cast iron pipe
Full length (more than 25 m) 1.5
No more than 40
3 longitudinal,
Horizontal side
To bend
Carbon steel pipe per 1 m
Total length of
(more than 25 m) diameter less than or equal to 100 mm
Diameter greater than 100 mm
The pipe diameter less than or equal to mm
Diameter greater than 0.5 mm
1
No more than 13
No more than 25
6.2 valve well depth, the underground fire hydrant at the top of the outlet from the bottom of the manhole cover distance less than 400 mm. The reason is buried pipeline coordinates and elevation are inaccurate.
6.3 pipe rinse several times, the rules and regulations of water quality is still can not meet the design requirements and construction. The reason is that tube chamber cleaning not net.
6.4 cement leakage of interface. Reason is not enough cement mark or expired, interface not good maintenance, mouth twisting operation is not serious, not twisted.
7 should possess the quality of the record
7.1 should have the materials and equipment factory certificate.
7.2 material and equipment in the inspection records.
7.3 piping system engineering.
7.4 piping system hidden inspection records.
7.5 pressure testing of piping system for record.
7.6 system flushing records.
7.7 system water records.
1 scope
The technology standard is applicable to civil buildings (village), working pressure is not greater than 0.6 MPa outdoor water supply and fire fighting pipe network of water supply cast iron pipe and galvanized carbon steel pipe installation.
2 construction preparation
2.1 material equipment requirements:
2.1.1 water supply cast iron pipe and pipe fittings specifications varieties should comply with the design requirements, uniform wall thick, smooth and neat, inside and outside can not have sand holes, cracks, stab fly and bumps. Socket diameter and pipe fittings should be modelling rules, and have the factory certificate.
2.1.2 galvanized carbon steel pipe and pipe fittings pipe wall inside and outside galvanized evenly, no rust. Wall without impalement, pipe fittings unbiased clasp, buckle, square buckle, the thread is not complete, the phenomenon such as Angle is incorrect.
No crack 2.1.3 valve, switch is quick, casting rules, the handwheel no damage, and have the factory certificate.
2.1.4 hydrant, underground gate valve, water meter varieties, specifications should comply with the design requirements, and have the factory certificate.
2.1.5 twisted mouth cement commonly use should not less than 425 # silicate cement and expansive cement (in gypsum alumina expansion cement or Portland cement). The cement must have the factory certificate.
2.1.6 other materials: oil asbestos wool, hemp rope, lead, lead, twine, antirust paint, oil, bolts, nuts, etc.
2.2 the main equipment:
2.2.1 equipment: set of silk machine, grinder, grinding wheel, saw, hydraulic test pump etc.
2.2.2 tools: a hammer and chisel, hacksaw, sets of silk, chop axe, hammer, welding tools, chain hoist, the pressure case, tongs, rope, shovels, pickmattock, etc.
2.2.3: other level, steel tape, etc.
2.3 operation conditions:
2.3.1 trench straight, pipe trench depth, width, conform to the requirements, the valve well, table well cushion, fire hydrant base construction is completed.
2.3.2 trench bottom ramming, no obstacles in the ditch. And shall have the landslide prevention measures.
2.3.3 pipeline construction materials shall not be piled up on both sides, and other items.
3 operation process
3.1 process:
Installation readiness to cleaning the pipe bore, pipes, pipe fittings, valves, fire hydrant, etc in place - pipe connection -
Grey cast maintenance to water pressure test, pipeline flushing
Zinc plated carbon steel pipe installation process see 1 to 2.
3.2 according to construction drawing examination trench coordinates, the degree of depth, flat, groove jaasiel compactness meets the requirements.
3.3 pipe socket internally and externally socket fly, be off in advance, such as casting sand bitumen paint with a blowtorch or gas welding bake out, with a wire brush to remove dirt.
3.4 the valves and pipe fittings in specified position, as a reference point. The iron pipe to pipe trench along the river bank, socket toward the direction of water.
3.5 according to the iron pipe length, determine section working pit position, the work before laying pit digging a well. Working pit sizes are shown in table l - 23.
Working pit size table - 23 in table 1
Hole size (mm)
Wide diameter long degrees (m) deep
Before (m) socket socket
Diameter 0.6 0.2 0.3 + 0.6) of 75 ~ 250
More than 250 diameter 1.2 1.0 0.3 0.4 +
3.6 after cleaning with large cast iron GuanShun to ditch, clean up the socket, and then to install piping, the socket interface straight position.
3.7 installation of pipe fittings, valves, etc should be accurate location, the valve stem vertically up.
3.8 outdoor hydrant with precast concrete block or the foundation of the cast-in-place concrete cushion, the soil layer below for ramming (figure l - 41).
, after 3.9 cast iron pipe stability near the pipe ends of filled soil cover, on both sides of the compaction, and should be slightly larger than the diameter of an interface between clean with hemp rope will interface plug, prevent dirt and debris into.
3.10 the asbestos cement interface:
Should be within the socket before 3.10.1 interface oil flax, preview hemp process is as follows:
3.10.1.1 scutching when the oil hemp twist into a twist, the roughness of 1.5 times larger than the pipe orifice clearance, hemp shares by the interface below gradually to the above, the frontier and twisted chisel in turn into the gap, twisting cut back that ma was hard up, play real hemp depth should be 1/3 of the socket depth.
3.10.1.2 socket depth of cast iron tube packing are shown in table 1 to 24.
Socket depth of cast iron tube packing table table 1-24
Tube diameter interface socket interface depth of packing (mm)
Gap between the total deep asbestos cement interface lead
(mm) (mm) (mm) hemp grey hemp lead
75 10 90 33 57 40 to 50
10 95 33 62 45 50 100 ~ 125
10 100 33 67 50 50 150 ~ 200
11 105 35 70 55 50 of 250 ~ 300
3.10.2 asbestos cement twisted mouth can not be less than 425 # silicate cement, 3 ~ 4 levels of asbestos, weight ratio of water: asbestos: cement = 1:3:7. Add water weight and temperature, to appropriately increase in hot summer.
3.10.3 twist joint operation: the mixed ash from bottom to top into hemp has good oil in the socket, stuffed with twisted chisel and a hammer to packing after tamping, according to the method step by step, playing so far. When the ash recessed socket 2 ~ 3 mm, depth is consistent, at the same time feel elastic, can think that have already been laid when giving a light grey.
3.10.4 interface after the twist, the interface to be not less than 48 h of curing.
3.11 lead interface:
See the l - 2 lead interface.
3.12 aprons interface:
3.12.1 appearance inspection aprons even thickness, no bubble, no double skin.
3.12.2, according to the socket depth in pin tube drawn in conformity with the socket end clearance of not less than 3 mm, maximum clearance is not greater than the mark given in table 1 to 25. Will aprons the slots into the socket aprons and the inside aprons and socket with soap and water, will find is leveling, pipe with tools such as chain would cast iron pipe slowly inserted in the socket to mark. Annular gap socket interface can be found in the table 1-26.
Cast iron GuanCheng jack's biggest gap - 25 in table 1
Laying along a straight line pipe diameter (mm) (mm) (mm) along the curve laid
75
100 ~ 200
4 of 300 ~ 500
5
June 5
7 to 13
14 ~ 22
Cast iron GuanCheng plug interface of annular gap big table 1-26
Diameter (mm) standard annular clearance (mm) (mm) allowed deviation
75 ~ 200
200 ~ 450
500 10
11
12 + 3 to 2
+ 4
2 -
3.12.3 using asbestos cement pipes and pipe fittings joint interface.
Zinc plated carbon steel pipe laying 3.13:
Zinc plated carbon steel pipe buried laying according to design requirements and soil conditions good anticorrosive processing. Other construction process detailed in chapter 2.
Unit 3.14 meter installation:
Unit meter installed in the center of the table bottom hole (see photo, l - 42).
Sprinkler bolt installation as shown in figure 3.15 l - 43.
3.16 hydraulic pressure test:
Should carry on the water pressure test, has installed the pipe test pressure value according to the requirements of design and construction shall be defined by the specification.
3.17 pipe flushing:
Pipe installation should be done before acceptance, rinse, the clean water quality to specified purchase requirements. Please related departments acceptance, make a good record of pipe flushing acceptance.
4 quality standards
4.1 ensure projects:
4.4.1 buried pipeline laying pipeline and aerial pipeline hydraulic pressure test result, must comply with the design requirements and the rules and regulations of construction.
Inspection method: inspect pipe network or segmented test record.
4.1.2 pipe and pipe support (block), it is forbidden to lay on the permafrost and untreated scarification.
Methods: to observe the inspection or check the concealed work record.
4.1.3 water supply pipe network before the completion inspection and acceptance, must be to wash system.
Inspection method: inspect irrigation records.
4.2 the basic items:
2 that the slope of the pipe should be consistent with the design requirements.
Testing method: use level (level), stay, and feet quantity check or check measurement record.
4.2.2 metal pipe socket and ferrule interface structure and the packing should comply with the rules and regulations of the design requirements and construction. Grey cast close-grained, full, level off, smooth, uniform circular seam gap, grey cast maintenance good, packing recessed socket edge is not greater than 2 mm, aprons interface flat, without distortion, end clearance accurately, aprons interface rebound clearance comply with the design requirements.
Inspection method: to observe the feet and check.
Holdings of galvanized carbon steel pipe of threaded connection quality requirements: threaded pipe thread machining accuracy, comply with the regulations of the international journal of pipe thread, thread clean, neat, no broken wires, the connection is firm, galvanized carbon steel pipe and pipe fittings galvanized layer without damage, thread showing a good corrosion resistance, joints have no visible defects such as hemp oil. Zinc plated carbon steel pipe welding mouth.
Test method: observation or the collapse of the check.
4.2.4 galvanized carbon steel pipe flange connection: requirements for docking parallel, close together, with the center line of the vertical pipe, the screw nut same length, and is not more than 1/2, screw diameter nut on the same side, liner material conform to the requirements of the design and construction rules.
Inspection method: to observe the examination.
4.2.5 pipe (,) and the installation of the tube holder (block) : requirements to construct correct, buried a right and firm, neat rows, close contact with the pipe.
Inspection method: to observe the feet and check.
4.2.6 valve installation quality requirements to type, specification, compression strength and leak test results comply with design requirements and construction specifications, location, import and export in the right direction, firm connection, closely. Opening and closing flexible, toward the reasonable, surface clean.
Inspection method: arbor inspection and check the factory certificate, test list.
4.2.7 buried pipeline coating quality requirements to comply with the design requirements and construction materials and structure rules, coil and pipe and pasted firmly between the layers of coil. Surface smooth, no crease, empty drum, defects such as sliding and sealing is lax.
Test method: to observe the cut or coating inspection.
4.2.8 pipes and metal stents coating types and quality requirement to paint besmear brushs times comply with the design requirements, good adhesion, without peeling, blister and the coating. Film thickness uniformity, colour and lustre is consistent, no flow and pollution.
Inspection method: to observe the examination.
4.3 allowable deviation projects:
Outdoor water supply pipe installation of allowable deviation and inspection methods shall comply with the requirements of table 1-27.
5 finished product protection
5.1 water supply cast iron pipe, pipe fittings, valves and fire hydrant, put to avoid collision damage.
5.2 fire hydrant and table well to build by laying bricks or stones good in time, to ensure that the pipe after installation from being damaged.
5.3 buried pipe to avoid deformation and damage caused by outside load, try after the water to drain in time, prevent cold.
5.4 to get casing pipe wear railway, highway foundation.
5.5 backfill soil, underground pipes to prevent displacement of the center line of the pipeline or damage to the pipe, the first application of artificial fill compaction around the pipe, and should have been done on both sides of the pipe at the same time, until the pipe top 0.5 m above, under the condition of without causing damage to pipeline, before the breaststroke ramming tamping taxes.
5.6 in the process of pipeline installation, pipeline before twisting mouth to interface to do temporary plugging, lest dirt into the pipeline.
6 should pay attention to quality problems
6.1 buried pipeline rupture. The reason is: jaasiel processes is not good, or improper fill compaction method.
Give way to install this camp outside the allowable deviation and inspection method of table 1-27
Will project allowable deviation (mm) test method
1 coordinates cast iron pipe buried
Laying 50 in the groove
20
With a spirit level,
Carbon steel pipe buried
Lay in the grooves and aerial 40
15 straight edge, pull
Feet and check
Level 2 cast iron pipe buried
Laying plus or minus 30 in the groove
Plus or minus 20
Carbon steel pipe buried
Laying in the groove + 15
Plus or minus 10
The level of
Every 1 m pipe cast iron pipe
Full length (more than 25 m) 1.5
No more than 40
3 longitudinal,
Horizontal side
To bend
Carbon steel pipe per 1 m
Total length of
(more than 25 m) diameter less than or equal to 100 mm
Diameter greater than 100 mm
The pipe diameter less than or equal to mm
Diameter greater than 0.5 mm
1
No more than 13
No more than 25
6.2 valve well depth, the underground fire hydrant at the top of the outlet from the bottom of the manhole cover distance less than 400 mm. The reason is buried pipeline coordinates and elevation are inaccurate.
6.3 pipe rinse several times, the rules and regulations of water quality is still can not meet the design requirements and construction. The reason is that tube chamber cleaning not net.
6.4 cement leakage of interface. Reason is not enough cement mark or expired, interface not good maintenance, mouth twisting operation is not serious, not twisted.
7 should possess the quality of the record
7.1 should have the materials and equipment factory certificate.
7.2 material and equipment in the inspection records.
7.3 piping system engineering.
7.4 piping system hidden inspection records.
7.5 pressure testing of piping system for record.
7.6 system flushing records.
7.7 system water records.
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