The heat treatment requirements of gas-fired hot water boilers are also an aspect that everyone can not ignore during the use process.
1. Evaluation of subcontractors for the heat treatment of gas-fired hot water boilers
2. Whether the pressure parts of the gas-fired hot water boiler have undergone heat treatment is determined by the technicians according to the “boiler gauge”, drawings and related technical standards.
3. Heat treatment operators should be familiar with construction drawings, process requirements, “can gauges” and related technical standards before performing heat treatment.
4. Visually inspect the workpiece of the gas hot water boiler before heat treatment. If there are any defects that affect the quality of construction, suggestions should be made to the upstream process or technical department.
5. Before performing heat treatment on gas-fired hot water boilers, heat treatment equipment and instruments should be thoroughly inspected. Whether the loop has been verified and whether it is in good condition during the verification process.
6. (Subcontractor) heat treatment technicians and (Subcontractor) heat treatment engineers review the heat treatment process. The company’s heat treatment engineer should also review the heat treatment process. The heat treatment process should be delivered to the company together with the heat treatment report.
7. After the welding work is completed, heat treatment shall be carried out before the completion of the pressure test.
8. Product inspection data should be inspected before heat treatment. After meeting the requirements, heat treatment can be carried out (subcontractors can be entrusted). Heat treatment workers (subcontractors) should be trained and qualified to work.
9. The heat treatment should be carried out according to the heat treatment process, and there should be enough temperature measurement points. After the overall heat treatment of the product after welding, consideration should be given to whether to take anti-deformation measures.
10. During the heat treatment process, the operator can observe the heat treatment data trend displayed by the automatic recording curve at any time, make timely adjustments to ensure that the requirements are met, and carefully fill in the heat treatment operation records, and have an automatically recorded temperature-time relationship curve.
11. After the heat treatment, the product label disappears or is unclear, and the relevant production workshop of the enterprise (under the supervision of the inspector) shall re-label the product.
12. When necessary, the company’s inspectors should supervise the implementation of the on-site heat treatment process for gas-fired hot water boilers.
13. Quality documents such as heat treatment report of gas hot water boiler, heat treatment time-temperature diagram, etc. shall be confirmed by the company’s heat treatment company and confirmed by the company’s supervisor.
