To promote the progress of centrifugal casting tube bending technology for chemical industry furnaces, this standard is formulated to regulate the bending, inspection, and testing of centrifugal casting tubes in chemical industry furnaces. This standard applies to centrifugal casting tubes bent using induction heating or furnace heating after fabrication. The main technical content includes: general provisions, terms and definitions, preparation before bending, manufacturing, inspection and testing, marking, packaging and protection, quality certification documents, etc. Preparation before bending includes pre-inspection and acceptance of raw materials, as well as evaluation of the bending process; it requires tube manufacturers to conduct quality checks and acceptances on raw material centrifugally cast pipe sections, ensuring they meet relevant requirements in this standard, and clearly defines technical requirements for bending after segmental assembly. It provides detailed descriptions of general requirements, scope of validity, inspection and testing items, and requirements for the evaluation of the bending process; it stipulates the contents that should be included in the report on the evaluation of furnace tube bending processes; it specifies relevant requirements for the bending process, end sections, and bevels of tubes; and it outlines the main inspection and testing methods for centrifugally cast tube bending as well as their qualification criteria.
T/HGJ 11501-2023 history
2023T/HGJ 11501-2023 Technical Specification of bending for Centrifugally Cast Tubes of Chemical Industry Tubular Furnace