Raw material characteristics:
* The steel is pure, the chemical composition is stable, the steel performance is stable;
* High precision coil size, shape control, coil surface quality.
Online detection technology:
* Ultrasonic plate exploration: detection of defects and defects in the longitudinal long, defective configuration tracking device can guarantee 100% defect detection, tracking and removal.
* Ultrasonic inspection of welds in line: weld longitudinal and transverse defect detection, heat affected zone delamination detection and burr height control, mainly used in the production process control.
In-line flattening test: Samples are made to weld and pressure direction into 0 ° and 90 ° flattening test to ensure the basic performance requirements of the weld.
* Water pressure test: The base material and the weld seam of each pipe are provided with the solidity guarantee.
* Off-line weld ultrasonic flaw detection: the end of the pipe and the bevel surface of the magnetic particle inspection and manual ultrasonic inspection of the pipe end and finished size inspection.
Product manufacturing process:
Converter steelmaking → furnace refining → continuous casting → hot rolling → uncoiling → strip Jiao Ping → cutting → butt welding → spiral band looper → washing edge → strip ultrasonic testing → forming → high frequency welding → online weld Ultrasonic flaw detection → online weld heat treatment → air cooling, water cooling → sizing → flying saw segment (flattening test) → pipe end chamfering → water pressure test → weld ultrasonic flaw detection → pipe end flaw detection → appearance dimension inspection → length measurement Re-mark → coating → packaging → factory
