API 5CT Couplings

Product Item：Connection: Casing: LTC, STC, BTC, Tubing: N

Standard & Grade : API 5CT, SY/T 6194, BS EN ISO 11960, NF M87-207, JIS G3439, IS:4270, H-40, J55, K-55, N-80, N80Q, C-75, L-80, C-90, T-95, P110, Q-125

API 5CT K55 LTC Casing Couplings, N80 BTC Casing Couplings Manufacturer, J55 BTC Casing Couplings Supplier, API 5CT L80 BTC Casing Mill, API 5CT K55 EUE Tubing Couplings, N80 NUE Tubing Couplings Manu

Surface: Corrosion proofing water based paint;

Packing: Bundled or bulk , seaworthy packing or for the client's requirement

Description

Pipe Process of API 5CT Couplings
Round Pipe → pipe inspection → NDT inspection MPI → End Threading → Thread Inspection → Coupling Threading lnspection → NDT inspection MPI ( coupling) → Phosphating (for coupling) → Coupling power Make up → Hydrostatic test → Drift test → Doping and Protectors Application → Coating → Measurement of Length and Weight → Colour Identification → Marking → Packing → Warehousing

ASTM /ASME
Product Name	Executive Standard	Dimension (mm)	Steel Code / Steel Grade
CASING AND TUBING	API 5CT	Casing:OD 4 1/2"- 20" (114.3mm-508mm) Tubing:OD 2 3/8" - 4 1/2" (60.3mm-114.30mm) WT: 0. 205"- 0.635"	H-40, J55, K-55, N-80, C-75, L-80, C-90, T-95, P110, Q-125
Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells	SY/T 6194 / BS EN ISO 11960 / NF M87-207	Casing:OD 4 1/2"- 20" (114.3mm-508mm) Tubing:OD 2 3/8" - 4 1/2" (60.3mm-114.30mm) WT: 0. 205"- 0.635"	H-40, J55, K-55, N-80, N80Q, C-75, L-80, C-90, T-95, P110, Q-125
SEAMLESS STEEL OIL WELL CASING, TUBING AND DRILL PIPE	JIS G3439	Casing:OD 4 1/2"- 20" (114.3mm-508mm) Tubing:OD 2 3/8" - 4 1/2" (60.3mm-114.30mm) WT: 0. 205"- 0.635"	STO-H, STO-J, STO-D, STO-E

Application of API 5CT Couplings:
According to API 5CT standard, steel material used for making the pipe billet supplied shall be grain refining treatment. This steel shall contain one or more grain refining elements, such as a certain amount of aluminum, niobium, vanadium or titanium, so that the austenite grains of the steel Grain refinement.
• Pipes supplied shall be manufactured in seamless type or EW type.
• Couplings, coupling stock and coupling materials shall be in seamless.
• Cold drawn tubing pipe shall be properly heat treated, otherwise is not acceptable.
• Casing and tubing attachment materials shall be seamless pipe, unless other type stated on the order.
API 5CT is standard technical specifications for steel casing and tubing pipes used for oil wells in petroleum and natural gas industries.
Besides casing and tubing, it also includes pup joints, coupling stock, coupling material, and accessory materials, and establishes requirements for three product specification levels (PSL-1, PSL-2, and PSL-3). The requirements for PSL-1 are the basis of this standard.
Connections
API 5CT is applicable to following connections which complied with API SPEC 5B:
• SC: Short round thread casing
• LC: Long Round thread casing
• BC: Buttress thread casing
• NU: Non-upset tubing
• EU: External upset tubing
• IJ: Integral tubing connections
Groups of Grade
• Group 1: All casing and tubing in Grades with H, J, K, N and R
• Group 2: All casing and tubing in Grades with C, L, M and T
• Group 3: All casing and tubing in Grade P
• Group 4: All casing in Grade Q

API CASING COUPLINGS - SHORT THREAD (STC)

API CASING COUPLINGS - LONG THREAD (LTC)

API CASING COUPLINGS - BUTTRESS THREAD (BTC)

API TUBING COUPLINGS - EXTERNAL UPSET END (EUE)

API TUBING COUPLINGS - NON UPSET END (NUE)

COUPLING PIPE GRADE IDENTIFICATION BY PAINT COLOR

Grade	Colour Coding (Painted Outside)
H-40	Black
J-55 or K-55	Green
N-80	Red
M-65 or L-80	Red with one Brown Band
L-80 Type 9CR	Red with two Yellow Bands
L-80 Type 13CR	Red with one Yellow Band
C-90 Type 1	Purple
C-90 Type 2	Purple with one Yellow Band
T-95 Type 1	Silver
T-95 Type 2	Silver with one Yellow Band
C-95	Brown
P-110	White
Q-125 Type 1	Orange
Q-125 Type 2	Orange with one Yellow Band
Q-125 Type 3	Orange with one Green Band
Q-125 Type 4	Orange with one Brown Band

Seamless and ERW Casing

Specification	API 5CT
Grades	K55, N80, L80, C95, P110, Chrome, J55(Modified), J55 (API), PS80
Special Grades	For sour services and for deep well with high collapse properties
Dimensions	OD 4" - 26" WT - 0.2 -0.5"
Length range	1, 2 or 3
Thread connections	API (STC and LTC), BTC, extreme line, integral connections, integral metal seal connections, threaded and coupled connections and integral thread seal connections, etc.

Seamless and ERW Tubing

Specification	API 5CT
Grades	J55 (API) J55(Modified), N80, L80, L80 13Cr, P110, Q125, H40 (API)
Thread connections	API 5B - Last Edition or Premium, EUE, NUE, special seal, metal-to-metal seal and VAGT