Carbon steel seamless steel tube factory inspection process

- Jan 24, 2019-

Carbon steel seamless steel tube industrial plant review method

The review of steel tube typically includes the inspection of the geometric size, surface quality; Inspection of chemical composition, mechanical properties, technological properties, and poker microstructure; Nondestructive review; Some special performance inspection and activity length deliberation, etc.

(1) check the geometric dimensions of steel pipes

The outside diameter, wall thickness, bending degree and length of the steel tube is checked on the review table with external calipers, micrometers, bending degree and length tape.

For outer diameter, wall thickness and length, automatic size activity devices (such as automatic diameter, thickness, and length activity devices) can even be used for continuous testing. In the late Nineteen Eighties, the steel pipe factories place into production typically have on-line automatic diameter and thickness activity devices and have length activity and deliberation instrumentality within the finishing space. For OCTG steel pipe additionally ought to check the thread parameters.

(2) review of the inner and outer surfaces of steel pipes

In general, the visual review is employed for internal and external surface inspection, and additionally, to visual review, the inner surface can even be used for reflection prism review. Some special-purpose steel tubes are needed to pass nondestructive review, together with eddy current, magnetic flux outpouring, ultrasonic, magnetic powder review, etc.

(3) check mechanical properties and technological properties

In order to verify that the mechanical properties of steel pipes meet the quality needs, it's necessary to check the mechanical properties of steel pipes by sampling.

The mechanical property takes a look at the main includes lastingness, yield strength, elongation, impact work, etc. Process performance takes a look at in the main includes flattening test, flaring take a look at, water pressure take a look at, edge rolling take a look at, cold bending take a look at, perforation take a look at, etc. These review things are elite per the various standards and also the different USES of steel tubes.

(4) nondestructive review

The nondestructive review refers to the inspection of internal and surface defects of steel tubes while not damaging them. At present, magnetic flux outpouring testing, inaudible testing, eddy current testing and fluorescent magnetic particle testing are wide employed in steel tube enterprises. In recent years, there are nice developments in nondestructive testing, and recently there are new techniques like acoustic emission optics, inaudible spectroscopic analysis testing, inaudible imaging testing, and ultrasonic extreme temperature testing.


Cangzhou Steel Pipe Group (CSPG) Co., Ltd

Cangzhou Steel Pipe Group (CSPG) Co., Ltd. is a large-sized, key metallurgic enterprise of Hebei Province in North China, whose history dates back to 1994. CSPG currently em/paces six member companies with products varying from SSAW, LSAW, ERW, seamless steel pipes to 3PE pipes, galvanized pipes, casing pipes, etc. A Joint-stock corporation, CSPG occupies an area of 600,000 square meters with a total asset of $530 million.

Specialized in the production of straight welded pipe spiral pipe galvanized pipe 3PE/3PP/FBE/TPEP internal and external epoxy powder internal and external epoxy resin cement mortar two cloth three oil buried pipeline IPN8710 non-toxic drinking water internal and external plastic coated lining plastic and other anti-corrosion pipe fittings for oil and gas pipeline water conservancy projects

Executive standard :DIN30670 DIN30678 CSA Z245 AFNOR nf49-710/711 NACE rp0394/0490 AWWAC 210/C213GB/T9711 API 5L ISO 3183Material: Q235B/Q355BGR A GR B x42-x80 l245-l555


Business scope: 21.3mm-3620mmLSAW submerged arc welded pipe 325-2020mmERW straight welded pipe 6mm-711mmSMLS seamless tube 10-1120mmSSAW spiral steel tube 219-3620mmDemand for quality suppliers and partners