Results from digital sun sensor calibration experiments show that the image background is almo.

Discussion on Several Problems of the Periodic Inspection Rules of Pressure Vessels;

Periodic inspection on the in-service pressure vessels in air separation unit

The periodic inspection of three long trailer seamless pressure vessels was performed by using conventional methods and acoustic mission testing.

Two methods of maize freshness qualitative determination were initially established.

The contents and methods as well as matters needed attention about periodical inspection of hyperbaric oxygen chamber which is different from pressure vessel have been introduced.

According to inspection experience, connecting with related rules and standards, periodical inspection content and items of cryogenic & adiabatic storage vessel are analyzed, inspection project is established and some periodical inspection questions lacking of idiographic standards about cryogenic & adiabatic storage vessel are solved.

In fact,the upper limit deformation rate of residual volume 10% was meaningless in practical periodical inspection.

This article briefly discusses main equipment and operating conditions of Taiyuan Iron and Steel(Group) Co,Ltd from smelting to rolling of seamless pipe,as well as conventional qualification test results of TP347H seamless steel pipe including surface quality, dimension,chemical composition,metallurgical structure,grain size,non-metallic inclusion,mechanical property at room temperatu.