What are some rigid regulations for obtaining a pipeline component assembly installation license?

For thermal pipes, the friction on the pipe supports should be as small as possible, but within a reasonable range to ensure safe and stable operation of the system. Cause Analysis Thermal expansion and contraction requirements: Thermal pipelines will produce significant axial displacement due to temperature changes during operation. If the friction force of the bracket is too large, it will prevent the pipe from expanding and contracting freely, leading to the accumulation of thermal stress, which may cause pipe deformation, bracket damage and even equipment interface failure. Low friction design purpose: Sliding supports (such as sliding pipe supports) usually require a friction coefficient ≤ 0.1 to reduce sliding resistance, enable the pipe to move smoothly along the design direction, and effectively release thermal stress. Balance of security and stability: Although the smaller the friction force, the better it is for thermal displacement, but if it is too small, it may cause unexpected sliding of the pipeline under accidental loads such as wind load and earthquake. Therefore, in engineering, the direction and amplitude of displacement are often controlled through guide brackets or limit baffles, rather than relying solely on high friction constraints.

The text of TSG 07-2019 does not include specific model, tonnage, or maximum pipe diameter requirements. It only states that “actual production needs should be met.” However, the actual implementation standards (appraisal and review practices) during the review are generally: type: Hydraulic pipe bending machine/CNC pipe bending machine can be used. Manual simple pipe bending machines are usually not recognized. ； Capabilities match product range: The maximum pipe diameter, wall thickness, and material of the prefabricated pipe section you apply for must be covered by the pipe bending machine. ； Common minimum configuration: Can bend DN50–DN200 (or larger) carbon steel/low alloy steel pipes with wall thickness ≥6mm ； Device status: Have equipment files, certificates, and operating procedures ； Metrology related (angle, length) are within the calibration validity period. a word: There is no uniform mandatory model, but it must match the product specifications you declare, work and be calibrated.