Non-Upset Tubing

 

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Non-upsetting tubing is a steel pipe with non-upset ends. The steel tubes are made of alloys of iron, carbon and other elements. NU is the abbreviation of non-upsetting joint. The difference between NU and EU (external upset) is that NU usually has 10 teeth per inch and EU often has 8 teeth per inch. This tubing is used in the construction industry, but it also can be used in other manufacturing and industrial applications. Non-upset tubing is used to transport fluids and gases for commercial and residential buildings.

Structure
The non-upsetting tubing is threaded on both ends. A coupling is installed at one end. Thread protectors are installed on both ends. This tubing is manufactured according to Intl Standard specifications.

non-upset tubing and coupling

types of integral connections

Non upset tubing connection
Upset Tubing (EUE) is a long tubing with joint installed in a wellbore to facilitate the extraction of oil and gas.  Non-upset tubing refers to the pipe end without the extra thick and straight thread and collar. Non-upset (NUE) tubing is used much less than EUE tubing

There may be the same material and grades with upsetting tubing and non-upset tubing.The maximum difference between them are the tube end, that is outer diameter. Non-upset tubing refers to the pipe end without the extra thick and straight thread and collar. Non-upset (NUE) tubing is used much less than EUE tubing. The cost of NUE is only slightly less than EUE, and the joint strength is substantially less. The coupling joint diameter of NUE is less than EUE, which offers some advantages when clearance is small. NUE joints are available in sizes of 1.050 to 4.500 in.

Tubing Pipe Dimensions and Weight Chart for API non-upset, external upset, and integral tubing connections

 

 Labels  Outside dia.  Nominal linear masses  Wall thickness  Inside dia. Mass gain or loss due to end finishing lb
 Plain end External upset  Integral joint
 1 2 Non-upset Ext.upsetT&C Integraljoint Non-upset  Regular Special clearance
NU T&C EU T&C IJ D (in) lb/ft lb/ft lb/ft t (in) d (in)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
1.050 1.14 1.20 1.050 1.14 1.20 0.113 0.824 1.13 0.20 1.40
1.050 1.48 1.54 1.050 1.48 1.54 0.154 0.742 1.48 1.32
1.315 1.70 1.80 1.72 1.315 1.70 1.80 1.72 0.133 1.049 1.68 0.40 1.40 0.20
1.315 2.19 2.24 1.315 2.19 2.24 0.179 0.957 2.17 1.35
1.660 2.09 2.10 1.660 2.10 0.125 1.410 2.05 0.20
1.660 2.30 2.40 2.33 1.660 2.30 2.40 2.33 0.140 1.380 2.27 0.80 1.60 0.20
1.660 3.03 3.07 1.660 3.03 3.07 0.191 1.278 3.00 1.50
1.900 2.40 2.40 1.990 2.40 0.125 1.650 2.37 0.20
1.900 2.75 2.90 2.76 1.990 2.75 2.90 2.76 0.145 1.610 2.72 0.60 2.00 0.20
1.900 3.65 3.73 1.990 3.65 3.73 0.200 1.500 3.63 2.03
1.900 4.42 1.990 4.42 0.250 1.400 4.41
1.900 5.15 1.990 5.15 0.300 1.300 5.13
2.063 3.24 2.063 3.25 0.156 1.751 3.18 0.20
2.063 4.50 2.063 0.225 1.613 4.42
2 3/8 4.00 2.375 4.00 0.167 2.041 3.94 1.60
2 3/8 4.60 4.70 2.375 4.60 4.70 0.190 1.995 4.44 1.60 4.00 2.96
2 3/8 5.80 5.95 2.375 5.80 5.95 0.254 1.867 5.76 1.40 3.60 2.56
2 3/8 6.60 2.375 6.60 0.295 1.785 6.56
2 3/8 7.35 7.45 2.375 7.35 7.45 0.336 1.703 7.32
2 7/8 6.40 6.50 2.875 6.40 6.50 0.217 2.441 6.17 3.20 5.60 3.76
2 7/8 7.80 7.90 2.875 7.80 7.90 0.276 2.323 7.67 0.80 5.80 3.92
2 7/8 8.60 8.70 2.875 8.60 8.70 0.308 2.259 8.45 2.60 5.00 3.16
2 7/8 9.35 9.45 2.875 9.35 9.45 0.340 2.195 9.21
2 7/8 10.50 2.875 10.50 0.392 2.091 10.40
2 7/8 11.50 2.875 11.50 0.440 1.995 11.45
3 1/2 7.70 3.500 7.70 0.216 3.068 7.58 5.40
3 1/2 9.20 9.30 3.500 9.20 9.30 0.254 2.992 8.81 5.00 9.20 5.40
3 1/2 10.20 3.500 10.20 0.289 2.992 9.92 4.80
3 1/2 12.70 12.95 3.500 12.70 12.95 0.375 2.750 12.53 4.00 8.20 4.40
3 1/2 14.30 3.500 14.30 0.430 2.640 14.11
3 1/2 15.50 3.500 15.50 0.476 2.548 15.39
3 1/2 17.00 3.500 17.00 0.530 2.440 16.83
4 9.50 4.000 9.50 0.226 3.548 9.12 6.20
4 10.70 11.00 4.000 11.00 0.262 3.476 10.47 10.60
4 13.20 4.000 13.20 0.330 3.340 12.95
4 16.10 4.000 16.10 0.415 3.170 15.90
4 18.90 4.000 18.90 0.500 3.000 18.71
4 22.20 4.000 22.20 0.610 2.780 22.11
4 1/2 12.60 12.75 4.500 12.60 12.75 0.271 3.958 12.25 6.00 13.20
4 1/2 15.20 4.500 15.20 0.337 3.826 15.00
4 1/2 17.00 4.500 17.00 0.380 3.740 16.77
4 1/2 18.90 4.500 18.90 0.430 3.640 18.71
4 1/2 21.50 4.500 21.50 0.500 3.500 21.38
4 1/2 23.70 4.500 23.70 0.560 3.380 23.59
4 1/2 26.10 4.500 26.10 0.630 3.240 26.06

 

Chemical Composition

 

Chemical Composition, a mass fraction (%)
Group Grade Type C Mn Mo Cr Ni Cu P S Si
min. max. min. max. min. max. min. max. max. max. max. max. max
 

 

1

 H40 — — — — — — — — — — — 0.03 0.03 —
J55 — — — — — — — — — — — 0.03 0.03 —
N80 1 — — — — — — — — — — 0.03 0.03 —
N80 Q — — — — — — — — — — 0.03 0.03 —
R95 — — 0.45 — 1.90 — — — — — — 0.03 0.03 0.45
 

 

2

 M65 — — — — — — — — — — — 0.03 0.03 —
L80 1 — 0.43 — 1.90 — — — — 0.25 0.35 0.03 0.03 0.45
L80 9Cr — 0.15 0.30 0.60 0.90 1.10 8.00 10.00 0.50 0.25 0.02 0.01 1
L80 13Cr 0.15 0.22 0.25 1.00 — — 12.00 14.00 0.50 0.25 0.02 0.01 1
C90 1 — 0.35 — 1.20 0.25 0.85 — 1.50 0.99 — 0.02 0.01 —
T95 1 — 0.35 — 1.20 0.25 0.85 0.40 1.50 0.99 — 0.02 0.01 —
C110 — — 0.35 1.20 0.25 1.00 0.40 1.50 0.99 0.02 0.005 —
3 P110 — — — — — — — — — — 0.03 0.03 —
4 Q125 1 — 0.35 — 1.35 — 0.85 — 1.50 0.99 — 0.02 0.01 —
  • The carbon content for L80 may be increased up to 0,50 % maximum if the product is oil-quenched.
  • The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the WT is less than 17,78 mm.
  • The carbon content for R95 may be increased up to 0,55 % maximum if the product is oil-quenched.
  • The molybdenum content for T95 Type 1 may be decreased to 0,15 % minimum if the WT is less than 17,78 mm.
  • For EW Grade P110, the phosphorus content shall be 0,020 % maximum and the sulfur content 0,010 % maximum. NL = no limit. Elements shown shall be reported in product analysis.

 

Mechanical Properties

 

Mechanical Properties
Group Grade Type Total elongationunder load Yield strength MPa Tensile strength min. Hardness max.
% min. max. MPa HRC HBW
 

 

1

 H40 — 0.5 276 552 414 — —
J55 — 0.5 379 552 517 — —
K55 — 0.5 379 552 655 — —
N80 1 0.5 552 758 689 — —
N80 Q 0.5 552 758 689 — —
R95 — 0.5 655 758 724 — —
 

 

2

 M65 — 0.5 448 586 586 22 235
L80 1 0.5 552 655 655 23 241
L80 9Cr 0.5 552 655 655 23 241
L80 13Cr 0.5 552 655 655 23 241
C90 1 0.5 621 724 689 25.4 255
T95 1 0.5 655 758 724 25.4 255
C110 — 0.7 758 828 793 30 286
3 P110 — 0.6 758 965 862 — —
4 Q125 1 0.65 862 1034 931 —
  1. In case of dispute, laboratory Rockwell C hardness testing shall be used as the referee method
  2. No hardness limits, but the maximum variation is controlled by the manufacturer.

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