6 Structure and assembly
6.1 General
The manufacturer shall provide a structural layout diagram of the complete set of equipment.
6.2 Disassembly and reassembly
Provided that the package is documented in the plant qualification record, the plant manufacturer may carry out the following activities:
Complete complete sets of equipment are dismantled at the factory;
The dismantled plant is transported to the end-user site; And.
Reassemble the plant at the end-user site.
Alternatively, assembly is permitted under the responsibility of the manufacturer, provided that it is documented in the qualification record of the plant.
Note: Local regulations may consider the reassembly of a complete set of equipment at the terminal site as an installation activity, and therefore may be subject to local installation procedures6.3 System interfaces
The manufacturer should specify the requirements for system interfaces related to explosion-proof performance in the package documentation. See 41。
If these interfaces are part of the package as a whole, they should be described as required in this document.
If these interfaces are far away from the package, the manufacturer should have a description of the necessary characteristics of these interfaces.
6.4 Ignition Hazard Assessment
Manufacturers should comply with GB T 383628 requirements, all non-electrical and electrical ignition hazards that may arise from the combination of EX equipment are assessed and documented. In addition, the assessment can be carried out in accordance with the hazard assessment method specified by the end user.
The following hazards should be documented:
ignition hazards directly related to the plant and how these can be eliminated in the plant;
Ignition hazards that are directly related to the package and are not eliminated in the package, but can be eliminated in the end-user site installation.
Ignition hazards that are not eliminated in the package but can be eliminated at the end user's site should be treated in accordance with GB T 38361 Requirements. Add the symbol "X" to the number of the explosion-proof certificate of complete sets of equipment, and list the special conditions of use in the explosion-proof certificate and instruction manual.
The ignition hazard of each EX device is assessed at the time of obtaining the explosion protection certificate and therefore does not need to be reassessed.
The certification body should confirm that the manufacturer has carried out an ignition hazard assessment and document the control measures and any remaining hazards.
6.5 Calculations
Manufacturers should comply with GB T 383615 and applicable explosion-proof type standards (if GB T 3836.)15. Not specified) provides all calculations and safety parameters related to the explosion-proof performance of the complete set of equipment (e.g., motor overload trip settings, ** pressure relief calculations, etc.).
Calculations related to the explosion-proof performance of the plant may include an increased safety type"e" Maximum power dissipation value of the enclosure, cable rating set by circuit breaker with overload protection, intrinsically safe loop analysis (also referred to as system description file or control diagram).
Note: Verification of calculations for long-range devices is not a requirement of this document.
6.6 Inspections and Tests
After the entire complete set of equipment is assembled, the manufacturer should inspect and test it, and it should be documented.
The electrical part of the complete set of equipment shall be in accordance with GB T 383615. Carry out inspection and test, and the non-electrical part shall be carried out in accordance with 64. Conduct ignition hazard assessment.
If disassembly and reassembly are involved, the entire plant should be inspected and tested after reassembly, or a part of the inspection and test should be carried out separately before disassembly and after reassembly, and should be documented.