GB 44016-2024Electro-magnetic emergency shut-off valve for gas (English PDF)

5.1.1 General requirements

5.1.1.1 The body of the components that separate gas and atmosphere shall be made of metal.

5.1.2 Metal materials

5.1.2.3 In addition to complying with the relevant requirements of GB/T 1239.2, the following requirements must also be satisfied.

5.1.3 Non-metallic materials

5.1.3.1 Non-metallic materials in contact with gas shall be gas-resistant.

5.1.4 Electrical components

5.1.4.1 The cable materials shall comply with the provisions of GB/T 5013.1 and GB/T 5023.1.

5.2 Structure

5.2.1 Design pressure Pressure-bearing parts include metal components that bear pressure during normal operation and components that bear pressure after the pressure differential seal fails. When the maximum working pressure is

0.01 MPa or

0.1 MPa, the design pressure shall be

0.4 MPa; when the maximum working pressure is

0.4 MPa, the design pressure shall be

0.6 MPa.

5.2.2 Structural length The structural length shall comply with the provisions of GB/T 12221.

5.2.3 Structural design

5.2.3.11 The manual shut-off triggering device shall have a protective mechanism, and manual operation can only be performed after the protection is removed.

5.2.3.12 The shut-off valves with remote transmission device shall have the function of outputting information, such as. valve position status and valve closing feedback signal, etc.

5.2.3.13 When powered off, the shut-off valves with nominal dimensions greater than DN25 shall be in a closed state.

5.2.3.14 The outgoing cables, terminals and joints of the shut-off valves shall be identified and explained. When equipped with a connection joint with the urban gas safety control system, electrical connection parts that prevent falling-off and reverse connections shall be used, and the protection degree shall not be lower than IP65 in GB/T 4208.

5.2.4 Explosion-proof structure

a) Flat-face Integrally Cast Flange

b) Raised-face Integrally Cast Flange

5.2.4.1 The shut-off valves shall adopt an explosion-proof structure.

5.2.4.2 The explosion-proof structural type shall be selected from the following four types, and shall comply with the relevant provisions of GB(/T) 3836 (all parts).

6.1 General Requirements

6.1.1 Under the following conditions, the shut-off valves shall normally operate.

6.1.2 The valve closing signal voltage and power supply voltage shall comply with the following requirements.

6.1.3 The current shall comply with the following requirements.

6.2 Appearance

6.3 Case In addition to complying with the requirements of 5.1.1.1, the shut-off valves with nominal dimensions greater than DN25 shall also adopt a metal case to protect the electromagnetic coil.

6.4 Strength of Pressure-bearing Parts After being subjected to the test in accordance with the provisions of 7.4, the pressure-bearing parts shall have no deformation, no cracks, and no visible leakage.

6.6 Rated Flow

6.6.1 The manufacturer shall clearly state the rated air flow rate at a pressure difference of 100 Pa between the inlet and outlet of the shut-off valves.

6.7 Emergency Shut-off Performance

6.7.1 The shut-off action shall be flexible and reliable. The shut-off time from the time the shut- off valve receives the external valve closing signal to the closing of the valve clack and valve seat shall comply with the provisions of Table 6. Table 6 -- Shut-off Action Time

6.7.6 For the shut-off valves with remote transmission function, the feedback signal shall be a passive contact signal, and the feedback signal shall at least be able to distinguish the open and closed states of the shut-off valve; after the shut-off valves are opened or closed, the passive contact point shall be able to output the corresponding status signal within 3 seconds.

6.8 Torque Resistance Apply the torque specified in Table 7 onto the shut-off valves with threaded connection, and there shall be no damage or deformation, and shall comply with the provisions of 6.5.

6.9 Bending Resistance Apply the bending moment specified in Table 8 onto the shut-off valves, and there shall be no damage or deformation, and shall comply with the provisions of 6.5.

7.1 Test Conditions

7.1.1 General atmospheric conditions When there are no special requirements, the test shall be carried out under the following atmospheric conditions.

7.1.4 Selection of instruments and devices for tests

7.2 Appearance Inspection When the ambient illumination is within the range of 300 lx ~ 500 lx, adopt the method of visual inspection to check whether they comply with the provisions of 6.2.

7.3 Case Inspection Check the body of the component that separates the gas from the atmosphere and the protective case of the electromagnetic coil. Adopt the method of visual inspection to check whether they comply with the provisions of 6.3.

7.4 Strength Test of Pressure-bearing Parts Apply pressure to the installed shut-off valve, close the two ends of the shut-off valve, and the shut-off valve is in the open state. The test pressure is

1.5 times the maximum working pressure, and not lower than

0.2 MPa. The pressure holding time shall not be lower than 3 minutes. Determine whether the test result complies with the provisions of 6.4.

7.7 Emergency Shut-off Performance Test

7.7.1 When testing the emergency shut-off performance during type inspection, it shall be carried out under the maximum working pressure. The test of emergency shut-off performance during exit-factory inspection can be carried out without load.

8.3 Type Inspection

8.3.1 When any of the following circumstances occurs, type inspection shall be carried out.

9.1 Marking

9.1.1 Marking on nameplate The shut-off valves shall have a fixed nameplate in an obvious position, and its content shall at least include.

9.1.2 Warning signs The setting of warnings signs for the shut-off valves shall comply with the relevant provisions of GB(/T) 3836 (all parts).