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Quality Standard

SY/T ***4Petroleum and natural gas industries Steel pipes for use as casing or tubing for wells

API 5CT CASING AND TUBING

BS EN ISO ****0Petroleum and natural gas industries Steel pipes for use as casing or tubing for wells

NF M*****7 Petroleum and natural gas industries Steel pipes for use as casing or tubing for wells

JIS G***9 SEAMLESS STEEL OIL WELL CASING, TUBING AND DRILL PIPE

IS ***0Steel tubes for well spainend casing pipes

Steel Grade H*0, J*5, K*5, N*0, M*5, L*0, L***3CR, C*0, C*5, T*5, P**0, Q**5, V**0

ProcessERW and Seamless

Size 

Outer DiameterCasing OD 4 1/2"- *0" (**4.3mm***8mm)

Tubing OD 2 3/8" - 4 1/2" (*0.3mm***4.*0mm)

Wall Thickness0. **5"- 0.**5"

LengthR1(4.*8mtr*7.*2mtr), R2(7.*2mtr**0.*6mtr), R3(*0.*6mtr or longer)

Connection Casing LTC, STC, BTC, VAM. Tubing NUE, EUE

EndBeveled, Square cut. And pipe protection cap specially for casing and tubing.

Surface Corrosion proofing water based paint

Heat treatment Normalized, Quencher & Temper

CoatingA choice of black or clear varnish exists for coating of the OCTG material. This coating is a solvent deposited non toxic phenolic PVB that provides atmospheric resistance to oxidation for a period of 6 to *2 months.

Marking Identification marking is applied to every pipe by means of paint stencilling along the length of the pipe and is in full accordance with Appendix D of API 5CT. Colour band marking is applied in accordance with said specification. Additional information pertaining to the bundle is printed on a weatherproof plastic label that is attached to the bundle.

Test Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield

strength, Elongation), Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness Test, Blow Test, Impact Test etc), Exterior Size Inspection, Nondestructive Test (Ultrasonic flaw detector, Eddy current flaw detector), Hydrostatic Test(The standard pressure is limited to *0,7 MPa (***0psi)), Electro-magnetic inspection to SR1 is carried out on all line pipes.