GB 15607-1995 Safety regulations for coating operations Safety of powder electrostatic spraying process

This standard specifies the safety and health requirements for the design, installation, operation, maintenance and management methods of powder electrostatic spraying process and its equipment. This standard applies to the design, installation, use and maintenance of powder electrostatic spraying process and its equipment, and also applies to powder spraying. Electrostatic fluidized bed method and fluidized bed method should also be used as a reference. GB 15607-1995 Safety regulations for coating operations Safety of powder electrostatic spraying process GB15607-1995 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Safety code for painting
Safety for electrostatic powder spraying process Subject content and scope of application
GB15607--1995
This standard specifies the safety and health requirements for the design, installation, operation, maintenance and management of the powder electrostatic spraying process and its equipment. This standard applies to the design, installation, use and maintenance of the powder electrostatic spraying process and its equipment, and also to powder spraying. Electrostatic fluidized bed method and fluidized bed method should also be used as a reference. 2 Reference standards
GB2893 Safety colors
GB2894
GB5083
GB6514
Safety signs
General principles for safety and health design of production equipment
Safety regulations for painting operationsPainting process safety GB6515Safety regulations for painting operations
Ventilation and purification of painting processes
GB7691
Safety regulations for painting operationsLabor safety and labor health managementGeneral guidelines for preventing electrostatic accidents
GB 12158
GB 12367
Safety regulations for coating operationsSafety of electrostatic spraying processSafety regulations for coating operationsSafety technical regulations for coating drying roomsGB14443
GB50058
Design specifications for electrical installations in explosive and fire hazardous environmentsDesign specifications for fire extinguisher configuration in buildings
GBJ140
3 Terms
3.1 Electrostatic powder spraying Electrostatic powder spraying A coating method in which powder coating particles are charged or polarized and adsorbed on the surface of a workpiece due to corona discharge of a certain electric field strength and aerodynamic effects.
3.2 Booth for electrostatic powder spraying A closed or semi-closed room or enclosure for electrostatic powder spraying that is not easy to accumulate powder, has good mechanical ventilation to prevent powder from escaping, and can effectively guide uncoated powder into a recovery device. Note: Powder spraying room is divided into electrostatic powder spraying room and non-electrostatic powder spraying room. Unless otherwise specified, the powder spraying room mentioned in this standard is the abbreviation of electrostatic powder spraying room. 3.3 Powder feeding device powderfeeder
A device that can continuously and evenly supply powder coating for spraying. 3.4 Powder recovery equipment recovery equipment of powder A device specially used to collect uncoated powder and separate it from the powder-gas mixture (dust-containing gas) Approved by the State Administration of Technical Supervision on June 19, 1995 and implemented on January 1, 1996
3.5 Purification equipment equipment of cleansing GB 156071995
A device used to capture fine powder that is difficult to be captured by powder collection devices and make the exhaust gas meet the emission standards. 3.6 Powder spraying area powder area
Area where there is a dangerous amount of flammable and explosive suspended powder or accumulated powder due to powder spraying operation. 4. Process safety of powder spraying area
4.1 The scope of powder spraying area should generally include:
a: powder spraying room, powder supply device (including powder conveying device of circulating powder supply device, powder silo and its unloading device), recovery device, fan, dry filter and powder conveying pipeline connected to it; Note: Whether the fan belongs to the scope of powder spraying area should be implemented according to Articles 3.2.3 and 3.2.4 of GB50058. b. The area within 3m horizontally and vertically from the opening of the powder spraying room; the place where powder coating is stored or piled up at the spraying site; c.bzxZ.net
d. Other areas that may produce explosive suspended dust or accumulated dust as determined by the labor safety and health department. 4.2 Fire and explosion prevention level of powder spraying area
4.2.1 The fire hazard area of ​​powder spraying area is divided into 22 areas, and the fire hazard classification of powder spraying area is Class B. 4.2.2 The powder spraying area is divided into 11 areas according to the explosive dust environment hazard area. Those that meet the requirements of Article 3.2.3 of GB50058 can be classified as non-explosion hazardous areas.
4.3 Design
4.3.1 The design of powder electrostatic spraying process shall comply with the relevant provisions of Chapters 2, 3 and 4 of GB7691. 4.3.2 The safety requirements of engineering design shall comply with the provisions of Chapter 5 of GB7691. 4.3.3 The safety and health indicators of the powder spraying room must meet the following requirements: a.
Except for local areas such as the spray gun outlet, the average concentration of suspended powder in the powder spraying room (i.e. the concentration in the exhaust duct at the outlet of the powder spraying room) must be lower than half of the minimum explosion concentration value of the powder. If the minimum explosion concentration (MEC) is unknown, the maximum concentration is not allowed to exceed 15g/m\; b. The energy released by the spray gun at one point should be less than 5mJ; the maximum allowable concentration of powder in the air in the operator's breathing zone is 10mg/m; c.
d. The wind speed at the opening of the powder spraying room should be 0.3~0.6m/s. 4.4 Location
4.4.1 Powder electrostatic spraying and painting operations should not be set up in the same work area. Under the condition that the organic solvent vapor in the painting operation area can be guaranteed not to spread to the powder electrostatic spraying area, it can also be set up in the same work area, but its occupational safety and health requirements should be considered according to painting.
4.4.2 The powder spraying area should be arranged in a single-story factory building; if arranged in a multi-story factory building, it should be arranged on the top floor of the building; if arranged in a multi-span factory building, it should be arranged in the side span, and it should comply with the relevant provisions of Chapter 2 of GB6514. 4.5 Fire prevention and explosion prevention
4.5.1 Except for the workpiece, no other flammable substances are allowed to enter within 10m outside the powder spraying area. 4.5.2 The surface temperature of the workpiece entering the powder spraying room must be lower than two-thirds of the ignition temperature of the powder-gas mixture, or 28° lower than the natural temperature of the powder used.
4.5.3 The following regulations should be followed in the powder spraying area: No ignition source, open flame, equipment and appliances that produce sparks are allowed; a.
Sparks produced by impact or friction are prohibited;
Heating equipment that will not ignite powder or powder-gas mixture must be selected; Fire extinguishers should be configured according to (BJ140, but fire extinguishers that easily cause powder coatings to fly or contaminate should not be used. d.
4.5.4 Reliable alarm devices and automatic fire extinguishers should be installed in the automatic powder spraying room. When a fire occurs, it can automatically sound an alarm and Turn off the main power switch
4.6 Floor
GB15607-—1995
The floor of the powder spraying area should be paved with non-combustible or flame-retardant electrostatic conductors or sub-conductor materials. The floor should be flat and smooth without gaps or grooves to facilitate the cleaning of accumulated powder.
4.7 Lighting
The powder spraying area should be illuminated by dust-proof cold light source lamps, and the illumination should comply with Article 4.2 of GB12367. When transparent materials are used for partition lighting, the following requirements should be met: Use fixed lamps as light sources;
Use partitions to separate the lamps from the powder spraying area, and the installation seal should be able to ensure that dust does not enter the lamps; c.
The partitions must be made of materials that are not easily damaged, Non-combustible or flame-retardant materials; the thickness of the deposits on the partitions is not allowed to affect the specified illumination; d.
The surface temperature of the partitions shall not exceed one-third of the self-ignition temperature of the powder. 4.8 Equipment
All standard equipment must meet the process safety requirements, among which standard safety equipment must be products that have passed the inspection and certification of safety agencies; non-standard safety equipment must be designed by a certified unit and comply with the requirements of GB5083 and Chapter 5 of this standard. 4.8.1 Electrical equipment in the powder spraying area should use explosion-proof and dust-proof electrical equipment, and its selection should comply with the provisions in the following table: Selection of explosion-proof structure of electrical equipment
Electrical equipment
Electrical appliances and instruments
Note: Symbol √ Indicates applicable.
Explosion-proof structure
Squirrel cage type
With brush
Fixed installation
Mobile
Portable
Explosion-hazardous area zone 11
4.8.2 In the powder spraying area, the surface temperature of the equipment in contact with the powder shall not be higher than the softening point of the powder, and the surface temperature rise of the electrical equipment shall comply with the provisions of Article 3.4.1 of GB50058.
4.8.3 When there is overloaded electrical equipment in the powder spraying area, reliable overload protection shall be installed. 4.9 Electrical circuits
The electrical circuits entering the powder spraying area shall comply with the provisions of Articles 1 and 2 of Article 3.4.1 of GB50058. 4.10 Electrostatic grounding
All conductors in the powder spraying area should be reliably grounded. The grounding resistance of each set of specially designed electrostatic conductors should be less than 1002. The total leakage resistance of the charged area of ​​the charged body to the earth should generally be less than 1×10°0, which can be relaxed to 1×10°0 under special circumstances. The grounding resistance of the workpiece should not be greater than 1×1042. All grounding wires should use copper wires with a cross-section of not less than 4mm2. Static eliminators confirmed by the labor safety and health department can also be used to eliminate the accumulated charge on the hanger and the workpiece.
4.11 Safety colors and safety signs
Safety colors and safety signs that meet the requirements of GB2893 and GB2894 should be set in a conspicuous position in the powder spraying area. 4.12 The powder spraying area should maintain a certain relative humidity. The relative humidity of the air in the powder spraying area for automatic continuous spraying should be 60% to 65%. The environmental noise in the working area shall not exceed 85dB(A).
4.13 Layout of powder spraying room
4.13.1 Powder spraying operation must be carried out in a specially set powder spraying room that complies with Article 2.1 of GB6514 and Chapter 5 of this standard. 287
GB15607-1995
4.13.2 In addition to complying with the requirements of Article 4.4, the layout of the powder spraying room should be arranged in a direction that does not interfere with the airflow. 4.13.3 The powder spraying room should avoid being arranged together with production equipment that produces and dissipates water vapor, acid mist, and other adhesive, corrosive, flammable, explosive and other media, and should be isolated from the areas where the above media are produced. 4.13.4 The powder spraying room is prohibited from being used as a paint spraying room. 5 Powder spraying equipment and its auxiliary devices
5.1 Powder spraying room and its connected pipelines
5.1.1 The powder spraying room must be made of non-combustible or flame-retardant materials. 5.1.2 The inner wall of the powder spraying room and ventilation duct should be smooth without concave or convex edges; the powder should be kept free of powder accumulation in the powder spraying room and its system, and all or most of the uncoated powder should be guided into the recovery device in an organized manner. 5.1.3 It is not advisable to use a spraying device that combines a powder spraying room with a single-stage filtering recovery and purification device that is prone to powder accumulation. 5.1.4 The rigid recovery device and the basically closed powder spraying room should have sufficient space volume and be equipped with a pressure relief device. 5.1.5 The distance between the electrode of the electrostatic sprayer (gun) in the powder spraying room and the workpiece, room wall, guide plate, hanger and carrier should not be less than 250mm. I. There should also be a large enough distance between the parts and they should not collide with each other. 5.1.6 The explosion transmission between the powder spraying room and the recovery device must be prevented. The automated production flow operation should adopt interlock control between the powder spraying room and the recovery device. When there is a fire at one end, the connection channel can be quickly and automatically cut off. 5.1.7 A fire alarm device should be installed in the automatic powder spraying room. The device should be interlocked with shutting down the compressed air, cutting off the power supply, starting the automatic fire extinguisher, and stopping the workpiece conveying.
5.1.8 The recovery fan and spray gun of automatic spraying should be protected by electrical interlocking. 5.1.9 All equipment in the powder spraying room must be reliably grounded according to Article 4.10. 5.1.10 Electrical devices unrelated to powder spraying operations shall not be installed in the powder spraying room. 5.1.11 The exhaust duct containing dust should be laid with a circular duct connected by a flange. 5.2 Drying (curing) room
5.2.1 The drying room includes an oven, a drying room and a drying tunnel. The safety requirements for its design, installation and use shall comply with the provisions of GB14443. 5.2.2 The workpieces entering the drying room should be protected from impact, vibration and strong airflow. 5.2.3 For every kilogram of powder on the workpiece in the drying room, 10m2 of fresh air should be delivered, and the permissible concentration of combustible gas should not exceed 25% of its explosion limit. The powder content in the air should comply with the provisions of Article 4.3.3a. 5.2.4 The structure of the drying (curing) room should be convenient for cleaning the accumulated powder. 5.3 Other equipment
5.3.1 The equipment for collecting, supplying and screening powder should comply with the provisions of Articles 4.8, 4.9 and 4.10, and the recovery device should comply with the provisions of Article 6.4.
5.3.2 The powder supply and screening device should be made of non-combustible or flame-retardant materials, and should be designed to have a structure that does not leak powder, is not easy to accumulate powder and is easy to clean.
5.3.3 The bearings of the fan and other parts of the carrying equipment must be equipped with protective devices to prevent dust intrusion. 6 Ventilation and purification
6.1 Ventilation and purification shall comply with the provisions of Chapters 4, 7 and 8 of GB6515. 6.2 The exhaust volume of the powder spraying room shall be calculated and checked from the aspects of safety and health in accordance with the provisions of Article 4.3.3. To ensure sufficient exhaust volume, the following principles shall be followed for calculation:
a. The opening area shall include all automatic and manual operation ports, workpiece inlet and outlet, catenary outlet, and other process installation holes; b. The maximum suspended powder volume in the spraying room shall include the maximum powder output of all automatic and manual guns, but the reduced amount of powder deposited on the workpiece and the amount of powder not deposited on the workpiece during empty spraying, as well as the amount of suspended powder returned to the spraying room by the powder feeder shall be taken into account; the exhaust volume of the fan shall be supplemented by 10% to 15% of the system leakage volume; c.
GB15607—1995
d. For the calculation method of exhaust volume, refer to Appendix A (reference). 6.3 The nameplate of the powder spraying room must indicate the rated minimum exhaust volume. 6.4 Recovery system
6.4.1 The fan of the first-stage cyclone separation of the recovery system must be arranged at the outlet of the cyclone separator according to the suction type. The fan blades should be made of aluminum alloy materials. Plastic fans are strictly prohibited. If the fan is connected in series with a second-stage bag dust collector and is automatically sprayed, the fan should be explosion-proof. The motor selection should comply with the provisions of Article 4.8.1. 6.4.2 The recovery device should be made of conductive materials. The bag filter should be made of materials that are not easy to generate static electricity, and fabric materials mixed with conductive fibers should be used.
6.4.3 The filtering recovery device should use an effective powder cleaning device, and it is not advisable to use a folding structure that is easy to accumulate powder. 6.4.4 The powder recovery device and its connecting pipeline must be equipped with a pressure relief device that can lead the explosion pressure to a safe position, and the length of the lead-out pipeline should be less than 3m.
6.4.5 The exhaust volume must be checked regularly. If the exhaust volume decreases due to a fan failure, the operation must be stopped for maintenance or the fan must be replaced. 6.4.6 The recovery system for continuous automatic powder spraying must be equipped with an air volume monitor. When the air volume is lower than the safe value, the powder spraying device can automatically stop spraying.
6.5 The ventilation duct must maintain a certain wind speed and should be well grounded to prevent powder accumulation and static electricity. 6.6 When the exhaust gas is recycled during powder spraying, it must be approved by the local labor safety and health department and must comply with the following regulations: a: The dust content of the air returned to the working area cannot exceed 3mg/m\; b. Dust deposition is not allowed;
c. The return gas does not contain flammable and explosive gases. 7 Storage and transportation of powder coatings
7.1 Only the amount of powder coatings required for the shift is allowed to be stored in the powder spraying area, and too much powder coatings should not be stored. 7.2 For continuous automatic spraying with a large amount of powder, the powder should be stored in a large closed silo (container), and the following protective measures must be taken: The silo (container) must be surrounded by guardrails to form a safety isolation zone. All fire and hot bodies are strictly prohibited from entering the isolation zone: a.
The silo (container) material should be made of conductive material and effectively grounded; h.
The powder should be prevented from flying during unloading. If a rotary valve is used for unloading, the powder should be prevented from sticking and scorching; c.
d.. Silos (containers) and powder spraying areas must be equipped with devices to prevent the transmission of combustion or explosion. 7.3 It is prohibited to package powder coatings with materials that are prone to static electricity, and it is prohibited to continuously feed a large amount of materials at one time and shake them strongly. 7.4 It is prohibited to place powder coatings in places that are easily exposed to heat sources such as drying ovens and heating equipment. 7.5 Powder coatings shall not be stored together with solvent-based coatings and thinners. 7.6 Powder coatings shall be transported by round pipes and shall not be transported by other special-shaped pipes. The pipeline for conveying powder coatings should be made of conductive materials or materials that are not prone to static electricity. It should be effectively grounded. Non-metallic pipelines should not be used for long-distance transportation. 7.7 The diameter of the pipeline for conveying powder should not be too small and should have a sufficiently large bending radius. Pipes, valves, and pipe fittings should be of a structure that is not easy to be blocked. The inner wall of the pipeline should be smooth and it should not be set with grids or other objects that hinder transportation, and prevent foreign debris from mixing in. 8 Operation and maintenance || tt || 8.1 The high-voltage electrostatic generator and powder spraying device can only be turned on at least 3 minutes after the exhaust fan is started. When stopping the operation, the high-voltage electrostatic generator and powder spraying device must be stopped first, and then the fan can be turned off after 3 minutes. 8.2 The following equipment or components and their specified indicators should be checked regularly. Check whether they are normal and meet relevant regulations: fan, recovery device and air volume. Powder concentration in the working area, powder concentration in the spray chamber, wind speed at the spray chamber opening section, exhaust gas emission concentration a.
Whether the fan bearings and other moving parts are adhered or coked with powder, and whether the powder hose and equipment are blocked; b.
C. Whether the high-voltage electrostatic generator, spray gun grounding, and drying (curing) chamber are normal. 289
GB 15607-1995
8.3 When the wind speed of the powder spraying room opening section is lower than 0.3m/s, the fan fails, the recovery powder supply system is blocked, the high-pressure system fails, the powder leaks and runs, etc., the operation must be stopped and the operation can be continued only after the fault is eliminated. 8.4 The accumulated powder in the powder spraying room must be cleaned during the shift. The accumulated powder should be sucked by a vacuum cleaner, and it is strictly forbidden to use the cleaning method of blowing alone. 8.5 The powder deposited on the ground, equipment, pipelines and walls of the working area should be removed in time to prevent the formation of a suspended powder-gas mixture. 8.6 The coating on the hanger should be cleaned frequently to ensure the grounding requirements of the workpiece. 8.7 Clean the accumulated powder on the surface of the heating element of the drying and curing chamber in time to prevent combustion caused by powder cracking and gasification. 8.8 Refer to Appendix B (reference) for equipment inspection and accumulated powder cleaning cycle. 8.9 When the automatic spraying system is in operation, except for the arms of the gun holder at the supplementary spraying station, no part of the human body shall enter the spraying room. 8.10 It is forbidden to repair the equipment when the high voltage of the equipment is not cut off. 8.11
Take practical measures to prevent dust from flying at the discharge port of the recovery and purification device during the unloading process. 2 During the operation, it should be observed that the hanger and the workpiece should not be stuck, sway, collide or slide off the position. 8. 12
Operators should wear anti-static work clothes, hats and conductive shoes. It is strictly forbidden to wear gloves and metal ornaments. 8.13
8.14 Operators must undergo pre-job training before they are allowed to work. 8.15 Non-job operators are not allowed to operate the equipment. 8.16 Operators should undergo regular physical examinations. People with respiratory diseases are not allowed to be powder spray operators. 290
GB 15607--1995
Appendix A
Calculation method of exhaust volume (exhaust volume) of electrostatic powder spraying room (reference)
The exhaust volume of electrostatic powder spraying room is usually set for the safety of powder spraying operation and the health of operators. It is calculated using the safety and health A1
methods respectively, and then the larger value is taken. A1.1 From the perspective of safety:
G:n(1-K).K/:K2×60.
Wherein, Q.-minimum exhaust volume calculated in a safe manner, m\/h; G---maximum powder output of a single spray gun.g/min; --number of spray guns spraying at the same time;
K--powder loading rate, generally 0.40.8;
K, ...-powder accumulation coefficient for discontinuous entry of workpieces (there are gaps between workpieces) 1.21.6, K2---powder suspension coefficient in the spray chamber, generally 0.5~0.7; -minimum powder explosion concentration·g/m2.
A1.2 To prevent dust from escaping:
Q23 600(Ar+A2+A,)V
Wherein: Q---minimum exhaust volume according to hygiene requirements, m\/h; A, operating surface opening area, m;
A2---part inlet and outlet area, m;
-process and other hole area, m;
section wind speed at the opening, generally 0.3~0.6m/s. Appendix B
List of routine inspection and cleaning
(reference)
Part name or index
Blower bearings and other moving parts
Fan exhaust volume
Powder concentration in powder spraying room and working area
Sectional wind speed at the opening of powder spraying room
Recovered waste gas emission concentration
Powder accumulation in powder spraying room
Hanging tool coating
Filter-type recovery device and purifier
Cyclone-type recovery cover and wet purifier
Dust adhesion or coking||tt| |Inspection and cleaning
Inspection and cleaning
Cycle, day
On duty~1
Additional instructions:
GB15607-1995
Continued Table B1
Part name or index
High-voltage electrostatic generator, grounding, floor of drying (curing) room working area
Equipment, outer wall of pipeline
Wall and ceiling
Powder hose and powder conveying equipment
Recovery exhaust and powder spraying room interlock
This standard is proposed by the Ministry of Labor of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Safety Standardization of Painting Operations. Internal
Check blockage, powder leakage
Cycle, shut-off
Shift～1
7～10
This standard was drafted by Jiangsu Labor Protection Science and Technology Research Institute, and Shanghai Xinli Machinery Factory, Suzhou Xiangxuehai Refrigerator Factory, Guangdong Shunde Xinglong Plastic Spraying Equipment Factory, Wuxi Paint Factory, Jiangsu Zhonghu Chemical Factory, Jiangsu Gaoyou Coating Equipment Manufacturing Co., Ltd., and Yudong Mechanical Engineering Company participated in the drafting.
The main drafters of this standard are Song Shide, Sun Mingyi, Liang Huilin, Xie Jianbing, Xue Qi, Yu Zhihong, and Ye Yongchao. 2926m/s. Appendix B
List of routine inspection and cleaning
(reference)
Part name or index
Blower bearings and other moving parts
Fan exhaust volume
Powder concentration in powder spraying room and working area
Sectional wind speed at the opening of powder spraying room
Recovered waste gas emission concentration
Powder accumulation in powder spraying room
Hanging tool coating
Filter-type recovery device and purifier
Cyclone-type recovery cover and wet purifier
Dust adhesion or coking||tt| |Inspection and cleaning
Inspection and cleaning
Cycle, day
On duty~1
Additional instructions:
GB15607-1995
Continued Table B1
Part name or index
High-voltage electrostatic generator, grounding, floor of drying (curing) room working area
Equipment, outer wall of pipeline
Wall and ceiling
Powder hose and powder conveying equipment
Recovery exhaust and powder spraying room interlock
This standard is proposed by the Ministry of Labor of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Safety Standardization of Painting Operations. Internal
Check blockage, powder leakage
Cycle, shut-off
Shift～1
7～10
This standard was drafted by Jiangsu Labor Protection Science and Technology Research Institute, and Shanghai Xinli Machinery Factory, Suzhou Xiangxuehai Refrigerator Factory, Guangdong Shunde Xinglong Plastic Spraying Equipment Factory, Wuxi Paint Factory, Jiangsu Zhonghu Chemical Factory, Jiangsu Gaoyou Coating Equipment Manufacturing Co., Ltd., and Yudong Mechanical Engineering Company participated in the drafting.
The main drafters of this standard are Song Shide, Sun Mingyi, Liang Huilin, Xie Jianbing, Xue Qi, Yu Zhihong, and Ye Yongchao. 2926m/s. Appendix B
List of routine inspection and cleaning
(reference)
Part name or index
Blower bearings and other moving parts
Fan exhaust volume
Powder concentration in powder spraying room and working area
Sectional wind speed at the opening of powder spraying room
Recovered waste gas emission concentration
Powder accumulation in powder spraying room
Hanging tool coating
Filter-type recovery device and purifier
Cyclone-type recovery cover and wet purifier
Dust adhesion or coking||tt| |Inspection and cleaning
Inspection and cleaning
Cycle, day
On duty~1
Additional instructions:
GB15607-1995
Continued Table B1
Part name or index
High-voltage electrostatic generator, grounding, floor of drying (curing) room working area
Equipment, outer wall of pipeline
Wall and ceiling
Powder hose and powder conveying equipment
Recovery exhaust and powder spraying room interlock
This standard is proposed by the Ministry of Labor of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Safety Standardization of Painting Operations. Internal
Check blockage, powder leakage
Cycle, shut-off
Shift～1
7～10
This standard was drafted by Jiangsu Labor Protection Science and Technology Research Institute, and Shanghai Xinli Machinery Factory, Suzhou Xiangxuehai Refrigerator Factory, Guangdong Shunde Xinglong Plastic Spraying Equipment Factory, Wuxi Paint Factory, Jiangsu Zhonghu Chemical Factory, Jiangsu Gaoyou Coating Equipment Manufacturing Co., Ltd., and Yudong Mechanical Engineering Company participated in the drafting.
The main drafters of this standard are Song Shide, Sun Mingyi, Liang Huilin, Xie Jianbing, Xue Qi, Yu Zhihong, and Ye Yongchao. 292
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