OCTG Tubing
Quality Standard
SY/T 6194 Petroleum and natural gas industries Steel pipes for use as casing
or tubing for wells
API 5CT CASING AND TUBING
BS EN ISO 11960 Petroleum and natural gas industries Steel pipes for use as casing
or tubing for wells
NF M87-207 Petroleum and natural gas industries Steel pipes for use as casing
or tubing for wells
JIS G3439 SEAMLESS STEEL OIL WELL CASING, TUBING AND DRILL PIPE
IS 4270 Steel tubes for well spainend casing pipes
Steel GradeH40, J55, K55, N80, M65, L80,L8013CR, C90, C95, T95, P110, Q125, V150
Process ERW and Seamless
Size
Outer Diameter Casing OD 4 1/2"- 20" (114.3mm-508mm)
Tubing OD 2 3/8" - 4 1/2" (60.3mm-114.30mm)
Wall Thickness 0. 205"- 0.635"
Length R1(4.88mtr-7.62mtr), R2(7.62mtr-10.36mtr), R3(10.36mtr or longer)
Connection Casing LTC, STC, BTC, VAM. Tubing NUE, EUE
End Beveled, Square cut. And pipe protection cap specially for casing
and tubing.
Surface Corrosion proofing water based paint
Heat treatment Normalized, Quencher & Temper
Coating A 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
12 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.
TestChemical 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 20,7 MPa (3000psi)),
Electro-magnetic inspection to SR1 is carried out on all line
pipes.
Mill Test CertificateEN 10204/3.1B
