GB 25202-2010Foam nozzle (English PDF)

5.1 Appearance requirements

5.1.1 sheet metal parts, stampings and other heavy skin surface should be no obvious mechanical damage and uneven defects.

5.1.2 welded seam should be uniform, no crack, burn, undercuts and other defects.

5.1.3 malleable surface should be free of heavy leather and scarring, shrinkage, shrinkage and other defects.

5.1.4 casting surface should be no flow marks, lack of material, cracks, blistering, peeling, and other defects.

5.1.5 Plating and coating should be uniform color, no peeling, bubbles, scratches and other defects.

5.2 Basic performance parameters The basic performance parameters of low expansion foam gun should meet the requirements in Table 1. The basic performance parameters in expansion foam gun should comply with regulations in Table 2 set. Low multiples - in conjunction with a multiple of the basic performance parameters of the foam gun should comply with the requirements in Table 1 and Table 2. Table

1 Low expansion foam gun performance parameters The amount of the mixture Constant flow / (L/s) Rated working pressure Ceiling/MPa Expansion ratio/N (20 °C pm) 25% of dialysate time (20 °C when)/min Range/m Flow Rate Tolerance/mixing ratio% /% 0.8 5<=N < 20 >=2 >=18 >=24 >=28 ±

8 Or 3 to 4 6 to 7 or manufacture 's Published value Table 2 expansion foam gun performance parameters The amount of the mixture Constant flow / (L/s) Rated working pressure Ceiling/MPa Expansion ratio/N 50% dialysate time/min range/m Flow Rate Tolerance/mixing ratio% /% 0.8 20<=N<=200 And not less than system Manufacturer published value >=5 >=3.5 >=4.5 >=5.5 ±

5.5 Water pressure resistance strength properties Foam gun by

6.4 Water pressure resistance strength performance test, the test pressure is 1.20MPa, to maintain 5min, the gun should not have to sweat, crack Land and permanent deformation phenomena.

5.6 Performance Drop Foam gun drop by

6.5 performance test, should be no damage to the loosening and normal operation.

5.7 Corrosion Resistance Foam gun by

6.6 corrosion test, the test after the gun should be no significant corrosion damage, and it works fine.

5.8 Performance impact resistant injection Foam spray gun by

6.7 Impact resistance performance test, under continuous pressure 0.88MPa injection 10min, should be no loose structure damage.

5.9 self-priming foam gun requirements Self-priming foam gun in the suction line should be provided to prevent backflow device, the device should be able to work reliably.

5.10 combined with the requirements of the foam gun Low multiples - in conjunction with multiple foam gun, should be clearly marked out the positions of the multiple, the switching should be reliable.

5.11 Interface Requirements An interface type and size should be consistent with GB 12514.1, the provisions of GB 12514.2, GB 12514.3 and GB 12514.4, and with stereotypes Consistent choice of interface types and dimensions.

5.12 non-metallic parts performance requirements Non-metallic parts of the barrel, the material shall comply with relevant national standards.

6.2 Basic performance test

6.2.1 test site and the foam liquid Test site shall be flat, test wind speed is less than 2m/s. Spray foam liquid should be consistent with GB 15308 requirements.

6.2.2 measurement range and mixing ratio The foam spray gun rack placed, adjust the horizontal axis of the gun angle (elevation angle) to 30 ° ± 1 °, adjusted to the center of the gun to the outlet end Surface height is 1m, wind measurements. Adjust the inlet pressure to the rated working pressure for at least stable ejection 30s, measuring range, while According to GB 19156-2003

7.9 was measured in the mixing ratio.

6.2.3 flow measurement Inlet pressure at rated working pressure, direct flow measurement with a flowmeter.

6.2.4 Low expansion foam expansion ratio and 25% gun dialysate time measurement Inlet pressure at rated working pressure, according to GB 19156-2003 expansion ratio of

7.10 and 25% of the measured dialysate time.

6.2.5 expansion foam expansion ratio and 50% gun dialysate time measurement Inlet pressure at rated working pressure, according to GB 20031-2005 expansion ratio of

6.20 were 50% and measuring dialysate time.

6.3 material inspection View by visual and material reporting methods.

6.4 sealing performance, water pressure resistance strength performance test The inlet end of the foam gun mounted on a test tube medium, cover with a stuffy or other tools to plug the remaining outlet end, excluding the pipe network and the gun in the air So that the gas pipe network and the gun filled with water, and then pressurize scratch not more than 0.1MPa/s, respectively, to boost the rate of 0.88MPa and 1.20MPa, each holding 5min. Drop Performance Test 6.5

6.8 GB 8181-2005 by the drop in performance tests.

6.6 corrosion test

6.9 GB 8181-2005 conducted by the corrosion resistance test.

6.7 Impact-resistant injection performance test The foam spray gun rack placed adjusted inlet pressure 0.88MPa, continuous injection 10min.

7.1 Type inspection

7.1.1 Where one of the following conditions, type of inspection should be carried out.

a) identification of new products; B) after the official production, raw materials, technology and design have a greater fluctuation;

c) discontinued after a year when production or restore normal production for three years;

d) the national quality supervision bodies during type inspection requirements. All items Content

7.1.2 Type inspection provisions of this standard, the test results should meet the standard requirements. Number of test samples

7.1.3 type test for three test procedures shall comply with the provisions of Appendix A.

7.2 Factory inspection

7.2.1 factory inspection should be carried out before shipment.

7.2.2 factory inspection carried out according to the provisions 5.1,5.2,5.3,5.4,5.5, the results should be consistent with this standard. 8 signs, packaging, storage, transport and use instructions

8.1.1 should be set in clear and obvious location on a permanent mark on the nameplate, shall indicate at least. product name, model specifications for the mixing ratio of public Cloth value, product number, the implementation of standards code, the manufacturer's name or trademark, the date of manufacture and so on.

8.1.2 The surface should be printed on the box the product name, specifications, quantity, packing external dimensions, gross weight, the manufacturer's name, address and telephone number.

8.2 Packaging Product packaging should ensure that no damage during normal transport and bulk packages, and compliance with user needs and the transport sector.

8.3 Storage Storage warehouse should be ventilated, dry and clean.

8.4 Transport Transportation under care, and should not be thrown to prevent the collision, to avoid the rain, sunlight and staining.

8.5 User's Guide The product should be accompanied by a Chinese manual, which should include the basic parameters of the implementation of product standards, maintenance, operating procedures and pay attention matter.