I Introduction
Steel structure welding is an important process in steel structure construction. Welding quality has important influence on steel structure quality, use performance, cost and economic benefit. Therefore, strict management and control of steel structure welding is taken to ensure the quality and satisfaction of customers. The Standard JGJ81-2002 is established for steel structures welding.
II Content
The Standard JGJ81-2002 covers general requirements, welding process approval, welding information, welding materials, welding procedure approval and use of welding materials, welding control and acceptance, welding process and welding quality control, welding materials and accessories acceptance and delivery.
1.General Requirements
The construction specification should be ratified to decide the type and strength of welding steel structure, the selection of welding process, weld size, weld face slope and weld toe slope as well as order and size of steel welding structure. The welding operation should be conducted in accordance with this standard.
2.Welding Process Approval
During the approval of welding process, test should be operated in accordance with related regulations. The engineer should check and record the test results. When applying a welding method to the welding process, the welding method logbook should be filled out; and when using a series production welds, the control should be in accordance with actual production requirements and transfer.
3.Welding Information
Welding information should be filled in the welding operation logbook, including welding method, welding process, welding materials, welding equipment, welding wire drawing operations, welding parameters, welding environment, as well as pre-treatment, cutting, working surface treatment and so on.
4.Welding Materials
The welders should strictly comply with the construction drawing when selecting the welding materials and accessories.
5.Welding Procedure Approval and Use of Welding Materials
The welding procedure should nave the approval of responsible engineer and qualified welders for actual operation. The welding operation logbook should have the signature or imprint to have the record of approval.
6.Welding Control and Acceptance
The welding process should be inspected by engineer in different stages and qualified welders should conduct self-inspection at each welding position. The welding quality should be judged in accordance with national standard.
7.Welding Process and Quality Control
Welding process and quality control must follow this standard. It includes the preparation before welding process, welding control, correction of welding defects and welding quality acceptance.
8.Welding Materials and Accessories Acceptance and Delivery
All welding materials and accessories should be checked in accordance with the regulation before acceptance and delivery. The engineer should summary and report it.
III Conclusion
The Standard JGJ81-2002 has established strict regulation to steel structure welding, which covers generally requirements, welding process approval, welding information, welding materials, welding procedure approval and use of welding materials, welding control and acceptance, welding process and welding quality control, welding materials and accessories acceptance and delivery. Strict management and control should be taken in accordance with this standard to ensure the quality and satisfaction of customers.
