What are the pipeline requirements of GMP certification for purified water equipment system?

Sanda Water (Beijing) Technology Co., Ltd. is a high-tech enterprise specializing in the production, processing, installation, maintenance and transformation of GMP standard purified water equipment. The produced water purifier starts from the technical requirements and user requirements (URS) of the water purifier, and every link must meet the standards, follow the 3D principle and use as few lines as possible. In particular, the non-contact induction faucet should be used as far as possible at the water distribution end of purified water (pay attention to the valve body material of 3 16L stainless steel) and provide a third-party testing material stability certificate report.

Installation and construction of purified water pipeline.

3. Building foundation

⑴? Construction drawings.

⑵? Code (standard) for construction and acceptance.

⑶? Construction organization design of process pipeline engineering in device area.

Second, the construction preparation

1. Operator

Operators are mainly plumbers and welders.

2. Construction materials and construction measures

⑴? building material

Prepare construction materials according to the material plan, deliver them to the site in time and supply them continuously. It mainly includes pipelines and corresponding fittings, valves, flanges and welding materials.

⑵? Construction measure materials

The materials for construction measures are mainly wood squares (plates) and rubber plates for building prefabricated platforms and prefabricated components to store spacers, and pipes, valves and other materials for system trial purging.

3. Main construction machines and tools

The main construction machines include electric welding machine, argon arc welding machine, grinding wheel cutting machine, beveling machine, air compressor, electric pressure testing pump, guide chain, jack, covered electrode drying oven, covered electrode incubator, hand mill, spirit level, square, nylon rope and non-carbon steel hammer.

Third, the installation process

1. Pipeline prefabrication

⑴? The pipes, valves and fittings used shall meet the design requirements and specifications. Prefabrication shall be carried out on the non-carbon steel platform, and the size of prefabricated pipe section shall be carried out according to the revised pipe section drawing, so as to ensure the transportation and hoisting conditions and leave room for adjustment.

⑵? incision

The pipe shall be cut by a grinding wheel cutter, and its surface shall be thoroughly polished. The inclination deviation of the end face is 1% of the outside diameter of the pipeline, and it is not more than 2mm.

⑶? Edge joining processing

The groove is machined by a beveling machine and a hand-held grinder. I-groove (no groove) with wall thickness ≤3mm, 60 ~ 70 V groove with wall thickness greater than 3~ 12mm on the open side, and blunt edge thickness1~1.5mm..

2. Pipeline welding

⑴? Welding mode

The welding of stainless steel pipes mainly adopts argon arc welding, argon arc welding, manual arc welding to fill the cover (argon gas is filled in the pipe for protection) and socket arc welding.

⑵? welding material

1) 0Cr 18Ni9, 18Ni9Ti, made of EO-19-10nb-16 (a132) covered electrode, H0.

2) The purity of argon is above 99.99%.

⑶? Welded joint assembly

1) When assembling pipes and fittings with the same wall thickness, the inner walls shall be flush; When assembling pipes and pipe fittings with different wall thicknesses, when the difference between the two wall thicknesses is greater than 1mm, they should be assembled after processing according to specifications.

2) The "I" groove and "V" groove of the butt joint clearance are 0~3mm and 0~0.5mm respectively.

3) Before assembly, stainless steel brush and acetone (alcohol) shall be used to clean the groove and internal and external pipe walls within 30 mm ..

4) Spot welding shall be carried out on three sides, and the length of each point shall not be greater than 15~20mm.

⑷? weld

1) Before welding, brush a piece of chalk powder with a width of 40~50mm 4mm on both sides of the joint, and start welding after drying.

2) When welding, try to choose the groove position between vertical welding and flat welding; When transporting the strip, covered electrode is used to make a small reverse semicircle or pick it up slightly.

3) When welding in layers, the bottom layer shall be cleaned, and the next layer shall be welded when the temperature of the weldment drops below 60℃.

4) The welding cover shall not be too wide, and each side shall be pressed over the groove 1~2mm. After welding, it should be cooled or watered in the natural environment.

⑸? Welding seam cleaning

After welding cooling, the weld should be cleaned in time, and the weld and its adjacent areas should be pickled and passivated.

⑹? Weld inspection

X-ray inspection shall be adopted for weld inspection, and the inspection standard shall meet the design requirements or be carried out according to the pipeline grade (class). Unqualified welds must be repaired, and the repair should be carried out according to the specifications.

⑺? Stainless steel pipes shall be welded at ambient temperature above -5℃. When the ambient temperature is lower than -5℃, preheating should be started before spot welding, and the preheating temperature should not be lower than the handle temperature (about 50℃). Precautions should be taken when it is windy, rainy (snowy).

3. Pipeline hoisting

⑴? Points for attention before pipeline hoisting

1) is used to prefabricate segments, pipes, valves, pipe fittings, etc. , according to the profile for inspection.

2) Check the elevation and coordinates (position) of pipe supports (supports, cranes and brackets).

3) Check the elevation, position, direction and caliber of the equipment interface.

4) Check the elevation, position, size and depth of reserved holes (holes) and embedded parts.

5) Check the flatness of pipes (prefabricated parts) according to the design requirements.

⑵? Pipeline hoisting

1) Pipeline hoisting shall be under the unified command of the rigger, and the rope buckle shall be fastened. Overload hoisting is strictly prohibited. In case of heavy rain, heavy snow or strong winds of magnitude 6 or above, outdoor hoisting operation is strictly prohibited.

2) Do not directly bind with steel wire rope (nylon rope) to avoid scratching the surface of the pipeline, and do not mix with carbon steel pipes. It should be firmly placed on the pipe rack and padded according to the design requirements.

4. Pipe joint

⑴? When connecting pipes, it is not allowed to eliminate the defects such as gaps, deviations, staggered joints or dislocations on the interface end faces by means of strong butt joint, heating pipes or multi-layer gaskets.

⑵? The connected pipes should be straight (the straightness of the inspection lot should be checked, and the allowable deviation is 65438±0mm/m/m, but the maximum allowable deviation of the whole length should not exceed 65438 00 mm), and the elevation, coordinates, slope and slope direction should meet the design requirements. Its elevation, slope and slope direction can be adjusted by the metal pad under the support or the lifting rod of the hanger.

⑶? Pipeline welding

See above about pipeline welding.

5. Valve installation

⑴? Before installing the valve, check whether the material, specification, model and pressure grade of the valve meet the design requirements, and pass the strength and leak test.

6. Testing and purging of pipeline system

⑴? Testing and purging of pipeline system shall be carried out through connecting system, but it can also be carried out in sections according to pipeline layout. Before the test and purging, the equipment in the system should be isolated or blocked blindly to prevent sundries from entering the equipment.

⑵? Air test and air purging are adopted for other pipelines.

⑷? Hydrostatic test is 1.5 times of working pressure, and air pressure test is 1. 1 times of working pressure. Air purging should have sufficient flow, and the flow should not be less than 20m/s. ..

⑸? After the trial purging is qualified, drain the water medium in the pipeline, restore the isolation equipment in the system to its original state, recover the original number of blind plates, record the trial purging records and hand them over to the archives.

7. Process pipeline insulation (cold) project

According to the design requirements and regulations and the construction technology of thermal insulation (cold preservation) project.

Fourth, quality standards.

1. Basic project

⑴? The slope is generally 0.03 but not less than 0.02.

⑵? Valve installation should be tight, perpendicular to the center line of the pipeline, and the operating mechanism should be flexible and accurate.

2. Allowable deviation items

⑴? The allowable deviation of coordinates and elevation should not be greater than15 mm.

⑵? The allowable deviation of verticality of riser shall not exceed 2mm per meter, and the total length shall not exceed 15mm.

3. Key points of quality inspection

⑴? Whether the polished pipeline smoothness meets the design requirements.

⑵? Whether the slope direction, gradient and tightness of the airflow conveying pipeline meet the design requirements.

⑶? Weld inspection results (X-ray inspection report).

⑷? Strength and leak test and purging results of pipeline system (inspection test and purging records).

⑸? Whether the pickling and passivation of the weld are qualified, and whether the gasket between the bracket (pipe rack) and the pipeline is correct.

Verb (abbreviation of verb) finished product protection

⑴? Stainless steel pipes shall not be trampled after installation, and scaffolding and slings shall not be borrowed.

⑵? When working nearby, carbon steel objects must be prevented from being parked on stainless steel pipes.

⑶? Valves, instruments and other valuables with small diameter threaded connections can be taken out and stored after installation to prevent damage or loss.

⑷? When the pipeline crosses the building (structure) and needs to tear down the wall and make a hole, contact the civil construction unit in advance to avoid affecting the structural strength and restore it to its original state after installation.

⑸? When the pipeline needs to be rebuilt, remove the protective shell of the insulation layer for protection. After the pipeline is repaired, it will be restored to its original state.

Matters needing attention about intransitive verbs

⑴? Stainless steel pipeline prefabrication shall not be carried out on carbon steel platform, and carbon steel hammer shall not be used for assembly.

⑵? During hoisting, pipes and other stainless steel objects shall not be directly tied with steel ropes.

⑶? Stainless steel pipe shall not be in direct contact with carbon steel pipe supports (supports, brackets and hangers) after installation, and shall be padded according to design requirements.

⑷? The chloride ion content of test water should not be greater than 50PPm.

⑸? Pipeline connection and assembly shall not be forced, especially when connected with rotating equipment, and excessive stress shall not be caused to the equipment.

⑹? When the pipeline construction is interrupted, it should be blocked to prevent sundries from entering the pipeline.

Purging and cleaning of pipelines

general clause

1. 1 ? After the pipeline pressure test is qualified, the construction unit is responsible for organizing purging or cleaning (hereinafter referred to as purging), and preparing a purging plan before purging.

1.2 ? The purging method should be determined according to the service requirements of the pipeline, the working medium and the dirty degree of the inner surface of the pipeline. Liquid or gas pipelines with a nominal diameter greater than or equal to 600mm should be manually cleaned, and liquid pipelines with a nominal diameter less than 600mm should be washed with water; Gas pipelines with nominal diameter less than 600 mm shall be purged with air; Steam pipes shall be purged with steam; Non-thermal pipelines shall not be purged with steam.

For pipelines with special requirements, corresponding purging methods should be adopted according to the design documents.

1.3 ? Equipment and pipelines that are not allowed to be purged shall be isolated from the purging system.

1.4 ? Before pipeline purging, orifice plate and flange shall be connected with regulating valve, important valve, throttle valve, safety valve and instrument. Should not be installed. For the above-mentioned welded valves and instruments, protective measures should be taken, such as bypassing or removing the valve head and seat protective sleeve.

1.5 ? Purging sequence should be carried out in the order of main pipe, branch pipe and drain pipe, and the dirt washed out by purging should not enter the qualified pipeline.

1.6 ? Before purging, check the firmness of pipe supports and hangers and reinforce them if necessary.

1.7 ? The dirty liquid discharged from cleaning shall not pollute the environment and shall not be discharged anywhere.

1.8 ? A forbidden zone should be set during purging.

1.9 ? During steam purging, flammable materials shall not be placed on or near the pipeline.

1. 10 ? After the pipeline purging is qualified and reset, other operations that affect the pipeline cleaning shall not be carried out.

1. 1 1 ? After the pipeline is reset, the construction unit shall inspect it together with the construction unit * * *, and fill in the "record of purging and cleaning of pipeline system" and "record of concealed works (closed)" in the format specified in Articles A.0.9 and A.0.4 of Appendix A of this specification.

2 ? Water? Rush? wash

2. 1 ? The pipeline should be flushed with clean water. When flushing stainless steel pipes, the chloride ion content in water should not exceed 25× 10.

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2.2 ? When flushing, the maximum flow rate should be adopted, and the flow rate should not be lower than1.5m/s.

2.3 ? Reliable drainage wells or drains should be introduced for drainage, and the cross-sectional area of the drainage pipes should not be less than 60% of the cross-sectional area of the washed pipes. When draining water, negative pressure should not be formed.

2.4 ? The drainage branch pipe of the pipeline should be thoroughly washed.

2.5 ? Water flushing shall be carried out continuously, and the color and transparency of water at the outlet shall be consistent with the visual inspection of inlet water.

2.6 ? When the pipeline is not running after being washed with water, it should be drained in time.

3 ? air purification

3. 1? Air purging shall be carried out by using a large compressor of the production device or by using a large container in the device to store gas for intermittent purging. The purging pressure shall not exceed the design pressure of vessels and pipelines, and the flow rate shall not be less than 20m/s. ..

3.2 ? When purging oil-free pipelines, the gas must not contain oil.

3.3 ? In the process of air purging, when there is no smoke and dust in the exhaust by visual inspection, a wooden target plate with white cloth or white paint should be placed at the exhaust port for inspection, and there is no rust, dust, moisture and other sundries on the target plate within 5 minutes, which is qualified.

5 ? chemical cleaning

5. 1 ? The scope and quality requirements of pipelines requiring chemical cleaning shall comply with the provisions of design documents.

5.2 ? When cleaning the pipeline chemically, it must be isolated from irrelevant equipment.

5.3 ? Production equipment must determine and use the formula of chemical cleaning solution, which has been proved to be effective and reliable by practice.

5.4 ? During chemical cleaning, operators should wear special protective clothing, goggles, gas masks and other protective articles according to the hazards of different cleaning solutions to human body.

5.5 ? When the pipeline qualified by chemical cleaning cannot be put into operation in time, it should be closed or protected by nitrogen filling.

5.6 ? The treatment and discharge of waste liquid after chemical cleaning shall comply with the provisions of environmental protection.