API-5CT NUE Tubing Pipe

 

API non-upset (NUE) tubing is put to use much less than EUE tubing.

The cost of NUE is usually just a bit less than EUE, along with the joint strength is substantially less. The coupling joint diameter of NUE is less than EUE, which provides certain benefits in cases where clearance is small.

API NUE joints are available in sizes of 1.050 to 4.500 inch.

 

Parameters		Value
Material		J55, K55, N80, N80Q, L80, P110, other grade available as your requirement
Outer Diameter		2-3/8"~4-1/2" (73.02~114.3mm)
Wall Thickness		4.83~16mm
Forms of Thread		EUE, NUE and Integral-joint
Length Range		R1(20~24ft), R2(28~32ft)
MTR		accordance with API Specification 5CT

 

Tolerances

Parameters		Value
Outside diameter		+-0.031 inch (0.79mm)
Wall thickness		-12.5%, positive deviations are limited by pipe weight
Weight Deviation		+6.5% /-3.5%

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Mechanical Properties

Grade		Tensile Strength (PSI/MPa)		Yield Strenght (PSI/MPa)
H-40		No less than 60000(414)		Between 40000 (276) ~ 80000 (552)
J-55		No less than 75000 (517)		Between 55000 (379) ~ 80000 (552)
N-80		No less than 100000 (689)		Between 80000 (552) ~ 110000 (758)
P-110		No less than 125000 (862)		Between 110000 (758) ~ 140000 (965)

Inspection

Physical properties are checked and each length hydrostatically tested, normally to only 3,000 psi in the plain end (unthreaded) condition. The following are also checked:

• Dimensions
• Weights
• Straightness
• Lengths

Part of this inspection is to drift all lengths.
Despite all the American Petroleum Institute (API) specifications and testing, some tubing defects are still found after delivery; thus, some operators do further inspection.

 

Inspection Method

• Size and surface inspection
• NDT and pressure test and third party certication
• Hydrostatic
• Drifting test
• Physical and chemicail analysis
• Hardness and pressure test.
• Electromagnetic
• Magnetic particle
• Ultrasonic 

Dimensions and Weight

sizes				ODDmm	weight			wttmm	Type of end
1	2				NU kg/m	EU kg/m	IJ kg/m
	NU	EU	IJ
									H40	J55	L80	N80 1?Qàà	C90	T95	P110
1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
2-3/82-3/82-3/82-3/8 2-3/8	4.004.605.806.60 7.35	-4.705.95- 7.45	—- -	60.3260.3260.3260.32 60.32	5.956.858.639.82 10.94	-6.998.85- 11.09	—- -	4.244.836.457.49 8.53	PUPNU– -	PNPNU– -	PNPNUPNUP PU	PNPNUPNU- -	PNPNUPNUP PU	PNPNUPNUP PU	-PNUPNU- -
2-7/82-7/82-7/82-7/8 2-7/8 2-7/8	6.407.808.609.35 10.50 11.50	6.507.908.709.45 - -	—- - -	73.0273.0273.0273.02 73.02 73.02	9.5211.6112.8013.91 15.63 17.11	9.6711.7612.9514.06 - -	—- - -	5.517.017.828.64 9.96 11.18	PNU— - -	PNU— - -	PNUPNUPNUPU P P	PNUPNUPNU- - -	PNUPNUPNUPU P P	PNUPNUPNUPU P P	PNUPNUPNU- - -
3-1/23-1/23-1/23-1/2 3-1/2 3-1/2 3-1/2	7.709.2010.2012.70 14.30 15.50 17.00	-9.30-12.95 - - -	—- - - -	88.9088.9088.9088.90 88.90 88.90 88.90	11.4613.6915.1818.90 21.28 23.07 25.30	-13.84-19.27 - - -	—- - - -	5.496.457.349.52 10.92 12.09 13.46	PNPNUPN- - - -	PNPNUPN- - - -	PNPNUPNPNU P P P	PNPNUPNPNU - - -	PNPNUPNPNU P P P	PNPNUPNPNU P P P	-PNU-PNU - - -
4444 4 4	9.5010.7013.2016.10 18.90 22.20	-11.00– - -	—- - -	101.60101.60101.60101.60 101.60 101.60	14.14-19.6423.96 28.13 33.04	-16.37– - -	—- - -	5.746.658.3810.54 12.70 15.49	PNPU– - -	PNPU– - -	PNPUPP P P	PNPU– - -	PNPUPP P P	PNPUPP P P	—- - -
4-1/24-1/2	12.6015.20	12.75-	–	114.30114.30	18.7522.62	18.97-	–	6.888.56	PNU-	PNU-	PNUP	PNU-	PNUP	PNUP	–
4-1/24-1/24-1/24-1/2 4-1/2	17.0018.9021.5023.70 26.10	—- -	—- -	114.30114.30114.30114.30 114.30	25.3028.1332.0035.27 38.84	—- -	—- -	9.6510.9212.7014.22 16.00	—- -	—- -	PPPP P	—- -	PPPP P	PPPP P	—- -
P-Plain end;N—Non-upset threaded and coupled;U—External upset threaded and coupled;I—insert joint.