ASTM A572 Gr. 50 Spiral Steel Pipes

　　Model NO.: SG49

　　Technique: SAW

　　Surface Treatment: Bared, Galvanized, Oiled, Color Paint, or Other an

　　Section Shape: Round

　　Origin of Place: China

　　Length: 6-12m

　　Pipe End: Plain End or Bevelled End

　　Specification: 219-3500

　　Type: Welded

　　Material: Carbon Steel

　　Usage: Pipeline Transport, Special Purpose, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Mining

　　Thickness: 4mm-25mm

　　Surface: 3PE

　　Certificate: ISO BV

　　Trademark: Shengtian

　　Origin: China

　　Product Description

　　1. OD: 219-3500mm

　　2. WT: 4-25mm

　　3. Thread: LTC STC BTC

　　Visual Examination of Coating

　　1. Pipe would be free of ovality through out the length of pipe

　　2. Pipe inside and outside surface should not have fold, hairline, delamination, crack, rolling

　　Defects such as folding, scarring. These defects shall be completely removed, remove depth

　　Shall not exceed 12.5% of the nominal wall thickness.

　　3. Coupling outside surface should not have fold, hairline, delamination, crack, rolling defects

　　Such as folding, scarring.

　　4. Casing pipe and coupling thread surface should be smooth, there should be no burr, tear

　　And something to make the thread tied to interrupt impact strength and other defects

　　Inspection of Physical Properties

　　Hydrostatic pressure test, flattening test, sulfide stress corrosion cracking test, hardness

　　Testing, Tensile test, transverse impact test, Determination of grain size

　　Application and Category

　　Oil casing is to maintain the lifeblood of any oil Wells. Due to the different geological

　　Conditions, downhole complex stress state, tension, pressure, bending, torsion stress

　　Combination on the pipe body, which raised higher requirement about the quality of the

　　Casing itself. Once the casing damage itself for some reason, that may lead to the reduction

　　Output of the well, or even scrapped.

　　ApplicationUsed in o il well drilling. It is m ainly used for drilling process and after

　　Completion of borehole wall support, to ensure that the drilling process

　　And the whole Wells after completion are normal running.

　　PaymentTT, L/C

　　Packing

　　1. Hexagonal shape bundles wrapped with strong steel tr apping. Show part

　　Of each casing pipe and coupling thread shall be screwed on the guard ring

　　In order to protect the threads

　　2. As customer ' s requirement

　　MarketMild east, North/South America, Europe, Asia, Africa etc

　　CertificateAPI, BV, SGS, MTC

　　Delivery timeW ithin 7-10 days