Ensuring the quality of longitudinal welded pipes is crucial not only for the safe execution of production operations but also for the personal safety of operators. These pipes are commonly used in a wide range of applications, including large-span grid projects, building steel structures, power and EHV transmission and distribution, mechanical engineering, bridges, railway stations, airports, stadiums, municipal pipe networks, foundation piling, water and gas pipelines, and highway construction.
To maintain high standards, the following steps should be taken:
Review Welding Process Specifications:
Verify that the specifications for welding wire and flux are correct according to the welding process requirements. This helps prevent welding quality accidents caused by incorrect materials.
Monitor Welding Environment:
Ensure that the welding environment is suitable. If the temperature is below 0°C or the relative humidity is greater than 90%, appropriate measures should be taken to enable proper welding conditions.
Inspect Groove Size:
Before welding, check the groove size, including the gap, blunt edge, angle, and misalignment, to ensure they meet process requirements.
Check Welding Parameters:
During automatic submerged arc welding, verify that the process parameters such as welding current, welding voltage, and welding speed are correctly set for both internal and external welds.
Maximize Arc Plate Usage:
Ensure that welding personnel make full use of the steel tube side arc plate length to strengthen the arc efficiency for both internal and external welds. This practice helps improve the quality of the welds at the pipe ends.
Clean and Prepare Weld Areas:
Supervise welding personnel to ensure that slag is thoroughly cleaned before welding. Check that joints and grooves are free of oil, rust, slag, water, paint, and other contaminants.
By adhering to these quality control measures, the integrity and reliability of longitudinal welded pipes can be significantly enhanced, ensuring their safe and efficient use in various critical applications.
United Steel Industry As the most important steel pipe manufacturer and exporter in China, in the past 20 years, we have completed more than 100 projects, with partners in more than 100 countries, and established relationships with oil and gas and EPC companies in many countries business relationship.
For more information about the product price, catalog and rolling mill inspection certificate,
please consult:Email:Sales@usisteels.com
