Interior sprinkler system installation

1 scope

This standard applies to buildings and structures set automatic sprinkler system installation.

2 construction preparation

2.1 after receiving the construction task, earnestly familiarity with drawing paper and construction site, found that construction of design issues, timely and relevant research, and go through the negotiation procedures. Determined according to the characteristics of the construction method, is equipped with the corresponding labor, equipment, materials, machinery and so on. Equipped with a complete set of life, temporary facilities.

2.2 equipment and materials:

2.2.1 automatic sprinkler system main equipment selection of materials should conform to the 6-l "General requirements for the installation of fire engineering" of the relevant content.

2.2.2 major equipment: spray pumps, fire department pumper connection, alarm valves and components, signal control valves, flow indicator, spray heads, pressure water supply device, power pumps. Spray heads, alarm valves, pressure switches, flow indicator and other major system component fire protection products should have a national quality supervision and inspection Center report.

2.2.3 General material: pipes and fittings, steel, welding electrodes, oxygen, acetylene, thick paint, hemp, Teflon tape, expansion bolts, gaskets, bolts, nuts, motor oil, paint, thinner, smaller lines, wire, batteries, and so on.

2.3 main machines, threading machines, wheel saws, bench drill, hammer, drill, hand wheel, electric drill, electric welding machines, electric pressure pumps and other machinery. Silk panels, pipe wrenches, pressure clamps, chain pliers, hammer, hacksaw, wrenches, nail guns, chains, electric welding and other tools. Steel tape measure, leveling ruler, machine n oil standard calipers, lines, spirit level gauge.

2.4 operating conditions:

2.4.1 should be complete construction drawings and related technical documents: electrical shall meet the construction requirements of water, the system should guarantee normal construction equipment and materials.

2.4.2 subject of embedded structure complete piping installation needed for baseline determination should be marked: Add ceiling height, ground elevation, location of partition lines. Before installation, Foundation should be inspected. Pipes and sprinkler head installation should meet the ceiling decoration.

3 operational processes

3.1 process

Installation preparation → network → → device → installed sprinkler branch pipe installed sprinkler system installation →

Water adjustment

3.2 installation preparation:

3.2.1 familiar with the drawings and control on-site review pipelines, equipment, location, elevation is a crossover into improperly arranged, with designers to study and solve in time, go through the negotiation procedures. Check for the right embedded-reserved tone, temporary pick your cut should be good consultation and design of civil engineering.

3.2.2 installation forward field equipment material test: entry equipment material specifications, and model should meet design requirements: appearance clean, no defect, and deformation and the rust; plating zinc or coated paint uniform no off: flange sealed surface should full smooth, no Burr and the radial Groove; silk buckle intact injury; pump disc car should flexible no block and the exception sound; equipment accessories should complete; alarm valve individually leakage test, valve, and nozzle sampling strength, and tightness test results should meet construction acceptance specification provides.

3.3 network installation:

3.3.1 automatic sprinkler system pipes should be selected according to the design requirements, generally use galvanized steel pipe and fittings, while nominal diameter less than or equal to 100mm, the thread should be used when the nominal diameter is greater than 100mm, flanges and welding, welding inside and outside surface for good corrosion protection.

3.3.2 installation before straightening the pipes and clear debris, stop is installed when you install pipeline exposure should be sealed well. Required when welding galvanized pipe openings should be preformed in advance, both ends of the pipe, if necessary by law lanhuo, finish cleaning corrosion after welding installation. Banning has been installed in hole welding on galvanized pipe.

3.3.3 the piping through the expansion joints should be set when Flex pipe, pipe installation should be installed horizontally 0.002~0.005 slope, slope discharge device.

3.3.4 automatic sprinkler system piping support and hanger selection and Atlas of practice should meet the construction requirements, maximum of support and hanger spacing in accordance with the following provisions:

Nominal diameter (mm): 25 32 40 50 70 80 100 125 150 200 250 300

Maximum spacing (m):3.544.55666.5789.51112

3.3.5 pipe installation:

3.3.5.1 spray pipe flange connections, each piping length should not exceed 6m, straight pipe can be connected together using several chain installed, but should not be too long. Also be numbered according to the order after straightening, lifting should first lift one end of the pipe, to be stable after lifting the other end.

3.3.5.2 piping fastening flanges, check that the flange end face is clean. 3~5mm the rubber gasket. Specifications should be in line with provisions of the flange bolts. Fastening bolts should be tightened the most unfavourable point, then the symmetric fastening. Flange connector should be installed on the easy Assembly and disassembly of the locations.

3.3.5.3 horizontal pipe generally consists mainly of hanger card, each pipe should be located 1 baffle support. Pipeline changes direction, slosh bracket should be added.

3.3.5.4 concealed in the shaft when the standpipe, embedded iron parts installed on the card in the tube well fixed, installation location from the ground or floor surface should be as 1.5~1.5M, higher than 5M support should be added.

3.3.6 duct installation:

3.3.6.1 piping branch provision before the lifting should be good. Silk tee location of provision. Weld on the pipe openings welded wrought iron pipe couplings. All provision and temporary plates.

3.3.6.2 pipeline diameter, use reducers. The pipe elbow bushing can not be used. When heart is required, 1 available on the three-way, four-way should not be more than 2.

3.3.6.3 every pipe in the water distribution tube, pipe between the two adjacent sprinklers set of hangers should not be less than 1, when the nozzle is smaller than the distance between three 1.8M can be set at regular intervals, but the hanger spacing should not be greater than 3.6m. Each water distribution pipes should be installed a anti shaking brackets. Pipe supports and hangers of the installation location should not interfere with the spray nozzle water effects.

3.3.7 the hydraulic test:

3.3.7.1 spray pipe hydrostatic test can be staged, while the highest point to exhaust, low install a pressure gauge on the water and check the piping for leaks, if there is leakage of flanges, valves and other parts should be fastened in front of pressure, boost leaks occur after mark when, after unloading. Leaking water when necessary.

3.3.7.2 hydrostatic test pressure should be determined according to the working pressure. When the system pressure is equal to or less than 1MPa, the test pressure with 1.4MPa when the system pressure is greater than 1MPa, the test pressure working pressure plus 0.4MPa. When pressure testing voltage 30min, Visual networks without leakage and deformation, and the pressure drop is less than 0.05MPa. After passing the test in time for the acceptance procedures.

3.3.7.3 winter test water pressure, ambient temperature should not be below + 5 c, if less than + 5 ° c anti-freeze measures should be taken.

3.3.8 rinse:

3.3.8.1 spray finish continuous flushing of pipes pressure test. Should ensure that the tube has enough amount of water when you flush. Drainage pipes should be connected to the drainage system, the emissions should be smooth and safe. Pipe cleaning should be carried out continuously, when the color of the water at the outlet, transparency and color of the inlet when the basic one to end. The flow direction of the pipeline flush and fire network flow in the same direction. After passing the rinse water tube should be completely removed and handled in a timely manner and acceptance procedures.

3.3.8.2 when unable to meet water flow and drainage conditions, shall be settled according to site conditions and design.

3.4 equipment installed:

3.4.1 water pump installation:

3.4.1.1 specification shall conform to the design requirements of the pump, water pumps, irrigation water should be used, pump base according to the design drawings, there should be no air bag and leak on the suction pipes in horizontal pipelines, and fire water tank connections should be interpreted with shock absorbers. Pump does not have a damper, but constant pressure pump damping device, water inlet and outlet with noise protection facilities, slow close check valve water pump outlet should be added.

3.4.1.2 pump piping installation pump location looking for smooth, firm followed. Pumping equipment shall not bear the weight of the pipe. Installation order for the check valve. Valves and pumps in turn bear jail, connected with the water pump pipe flanges and the valve flange tight prison, straight lines attempt to find, pipe sizes, on pipe welding flange, then remove welded flange release, cooled and then connected with the valve, then another flange connected to the welding and piping.

3.4.1.3 piping flanges should be compatible with pumps, valves, flanges, valve install the handwheel should be easy, elevation, piping aligned.

3.4.2 tank installation: tank should be in place before Cap structure and full water test should be done. Fire and other shared water tank with water, we should ensure that water is not being used, with 10 minutes of fire water. When combined with water, water should be in a constant flow, to prevent a deterioration in water quality. Fire outlet check valve should be added. All tank nozzles should perform if openings welded on site should be welded on the tank plate.

3.4.3 alarm valve installation: when installing the alarm valve water control valve, alarm valve should be installed first, then the auxiliary pipes and accessories according to the manual installation. Water control valve, alarm valve connection to the water pipe, the flow in the same direction. Installation location should comply with the design requirements of the alarm valve group. When the design is not required, alarm valves should be installed in a clear location easy from the interior floor height should be 1.2m: distance on either side and the wall should not be less than 0.5M positive and wall distance should not be less than 1.2m. Alarm valve group installed an indoor ground drainage.

3.4.4 Fire Department pumper connection installation: pump design specifications should be based on a combination of the selected, there are three types: wall, floor, underground type. The installation location should be clearly marked, valve location should be easy to operate, combined with nearby there should be no obstacle. Working pressure safety valve on the system pressure, combined with the drain valve shall be installed.

3.5 spray head pipe installation;

3.5.1 spray head pipe installation ceiling-type head end of a pipe, it tube cannot be completed simultaneously with the branch pipe, and you want to synchronize with the ceiling decoration. Ceiling joist loaded, set according to the thickness of ceiling material provision of the sprinkler head elevation, ceiling decoration to determine the coordinates of the sprinkler head, tube reserve location accurate. Branch pipe size is 25mm, end 25mmx15mm different diameter pipe straps, cable installation. Pipe elbow 100mm cards should be added at the end of fixed to prevent the spray head contact with the ceiling is not strong, and dislocation. Branch pipe ready, reservation of mouth plugs tightened.

3.5.2 conditions of a sprinkler head upward and branch pipe installed at the same time good. Difficult operations of other pipe after installation location should also be installed upward spray head.

3.5.3 sprinkler system pressure test: ceiling prior to pressure testing of the system, in order not to affect the progress of ceiling decoration can be staged. After passing the test to reduce the pressure working pressure tightness test, voltage 24-hour seepage and leakage is qualified.

3.6 system components and sprinkler head installation:

3.6.1 installation the flow indicator: is usually installed on each floor or a regional branch on the trunk. Flow indicator should be kept 5 times before and after the installation length of straight pipe pipe diameter, should be installed horizontal vertical loading, pay attention to the flow direction and the line indicates the direction of the arrow, after the installation of a flow indicator lodicules, diaphragms should be flexible and should not be rubbed with the wall.

3.6.2 alarm valve accessories installation: alarm valve parts typically include pressure gauges, pressure switches, delay, filter, water alarms, drain, etc. Should strictly follow the instructions to install or install Atlas. Water alarms should be installed in the public channel or on the wall near the Office, and maintenance test valve should be installed. Water alarms and alarm valve connection should use galvanized steel pipe, when the nominal diameter is 15mm, the length should not exceed 6m when 20mm is the nominal diameter, the length should not exceed 20m. Hydraulic Bell starting pressure of installation shall not be less than 0.5MPa.

3.6.3 sprinkler head installation: spray head generally hanging mounted after the installation of the roof, installed in special wrench should be used. Installation of sprinklers at the vulnerable to mechanical damage, should be added shields. Sprinkler head screw packing PTFE tape should be used.

3.6.4 throttling devices installed: throttling in nominal diameters of not less than 50mm should be installed on a horizontal pipe; orifice flow in a pipe bend should be installed on the downstream side of the straight tube, and distance should not be less than the nominal diameter of the corner twice times.

3.7 water connection debug:

3.7.1 overall water sprinkler system installation and make preparing to debug a system reaches normal operating pressure.

3.7.2 release through the end device, when pipe network pressure from dropping below a set value, the regulator pump should start, stop water pipe network pressure returned to normal, and regulator pump should stop running. When a terminal device to 0.94~1.5L/s when the flow of water, regulated pumps should be locked. Flow indicator, pressure switch, water alarms and fire pumps and timely actions and issued the corresponding signal.

4 quality criteria

4.1 project:

4.1.1 pipe hydrostatic test results and use of fire control system must conform to the design, specifications, dimensions and construction specifications.

4.1.2 specifications must conform to the design requirements of the pump, pump bearing temperature rise test run must be in order.

4.1.3 automatic sprinkler and drencher fire fighting installations in the nozzle position, spacing and direction must comply with the design requirements and construction specifications.

4.2 Basic project:

4.2.1 galvanized pipe threaded connections should be solid, seams no leakage of Yau Ma Tei and in good preservation.

4.2.2 flanges should be butted closely parallel and perpendicular to the pipe centerline, screw out the nut length is greater than the diameter of the screw 1/2.

4.2.3 galvanized steel pipe welding, welding flatness, and strengthening compliance with the construction requirements of weld surface without burn-through defects such as cracks, inclusions, porosity, welded joints for good corrosion protection both inside and outside.

4.3 allowable deviation:

4.3.1 horizontal piping installation slope should be between 0.002~0.005.

4.3.2 hangers with the distance of the nozzle should not be less than 300mm, the distance from the nozzle at the end is less than 750mm.

4.3.3 hangers should be located in the adjacent sprinklers on the pipe segment, when adjacent nozzle spacing less than 3.6m, and can be set to 1. Less than 1.8M, allows the isolation period settings.

5 finished product protection

5.1 after the construction of fire control system and components of various parts of the equipment to be protected to prevent the touch running water, damaged decoration products.

5.2 alarm valve fittings and parts of the instrument shall strengthen management to prevent loss and damage.

5.3 fire protection piping installation and civil engineering and other pipe contradictions, not allowed to demolition, is designed to handle the negotiations proper solution.

5.4 installation without damage and contamination of the spraying ceiling decoration.

6 quality problems to be noticed

6.1 due to the poor coordination of installation processes, no overall arrangement makes the spray pipe demolition is serious.

6.2 due to not pressure test caps, after causing water leakage.

6.3 due to branch pipe elbow without fixed cards at the end, branch size allowed, the spray head contact with the ceiling is not strong, and not being.

6.4 because no cable installation, sprinkler head is not a row, take place.

6.5 as the flow indicator installed in opposite directions; electric contact poor contact caused by oxides or flow indicator lodicule doesn't match the diameter and its insensitive.

6.6 Fire Department pumper connection cannot be pressurized. Because the valve does not open, check valve installed backwards, or caused by a blind flange was not removed.

7 quality records

7.1 material certification, product certification, inspection report of major system components.

7.2 entering material inspection records.

7.3 construction records

7.3.1 valve records.

7.3.2 leak test record heating and plumbing engineering strength.

7.3.3 heating and plumbing engineer Chong (blow) wash test record.

7.3.4 irrigation experiment of heating and plumbing engineering records.

7.3.5 heating and plumbing engineering water test records.

7.3.6 single water pump commissioning record.

7.3.7 debug reports.

7.4 the construction records

7.4.1 construction logs.

7.4.2 self and cross-checking records.

7.5 pre inspection records

7.6 conceal engineering acceptance record

7.7 the construction programme

7.8 technical programme

7.9 quality inspection and assessment of

7.9.1 installation of indoor water supply pipeline assessment.

7.9.2 indoor water supply pipeline assessment-installation of the annex.

7.9.3 subsidiary equipment evaluation of indoor water supply pipeline.

7.9.4 quality assessment for heating and plumbing Engineering Division.

7.9.5 impression quality heating and plumbing engineering assessment.

7.10 construction inspection information

7.10.1 intermediate inspection records.

7.10.2 unit engineering acceptance record.

7.10.3 fire supervision Agency verification certificate.

7.10.4 quality oversight body checks.

7.11 design changes, record of negotiation

7.12 the construction plans

8 resources

8.1 the standards for building equipment installation project construction technology.

8.2 the General water supply engineering Atlas 918B3.

8.3 the code for construction and acceptance of automatic sprinkling fire-extinguishing system GB50261-96.