API Tubing And Casing Chart - Updated 2026

Union Steel Industry offers a full range of API Steel Casing and Tubing to meet the various needs of Petroleum Exploration and Production. The following are tubing and casing charts, continue reading to learn more.

OCTG Tubing Dimensions and Weight Chart:

Steel Casing Pipe Dimensions and Weight Chart:

Specifications of API Tubing And Casing

- Product Type:API Tubing,EUE Seamless Tubing；NU Seamless Tubing；Premium Tubing
Outer Diameter (OD):48.26mm-114.30mm
Wall Thickness(WT):3.18mm-16mm
Length:R1, R2, R3
Standard:API 5CT J55,N80-1,V80-Q;L80-1;L80-9Cr;L80-13Cr;C90;C95;P110,Q125
Materials:H40, J55, K55, N80, L80, C90,T95 and P110
Thread type:NUE.EUE,BAM,Special clearance,VAN TOP,NEW VAM
Application:Oil Tubing is widely used for transporting crude oil and natural gas to surface after drilling, which also bears pressure from exploration.
Production technology:Plain pipe-end upsetting- Austenite treatment-Quenching-Tempering-straightening-(Non-Destructive Testing)- Threading-Thread inspection-coupling MPI-phosphating-Coupling make up-Drifting-Hydrostatic testing-Measuring&Weight-Marking&Stenciling-Coating-Packing Casing and tubing-Transportation

- Pipe Type:Oil casing, API 5CT casing,API Spec 5CT J55 K55 N80 L80 Casing Pipe;Seamless Steel Oil Well Casing Pipe
Outer diamater(OD):114.30mm-508mm
Wall thickness(WT):5.21mm-16.13mm
Length:R1; R2; R3
Gread：J55;K55;N80-Q;L80-1;L80-9Cr;L80-13Cr,C95，P10
Standard:API 5CT PSL1/PSL2  J55,K55,N80-1,N80-Q,
API 5CT PSL1/PSL2  L80-1, L80-9Cr,L80-13Cr,C90, C95, P110, Q125
Thread types:STC;LTC;BTC;VAM TOP equivalent;New VAM equivalent;CS equivalent;HSC equivalent;NUE;EUE;LTC;XC
Thread:NUE, EUE, VAM, STC, LTC, BTC, XC, VAM TOP, NEW VAM,HYDRILL CS
Application:Casing Pipe is widely used for fastening oil and gas well wall or borehold, with bigger diameter than tubing, including surface casings, technical casings and oil layer casings.

FAQ
Q: What is an API Tubing and Casing Chart?
An API Tubing and Casing Chart is a standardized table defined by API 5CT that lists pipe dimensions, wall thickness, inside diameter, and nominal weight for tubing and casing.

Q: What does nominal weight (lb/ft) mean in an API tubing and casing chart?
Nominal weight (lb/ft) is the theoretical linear mass per foot calculated from pipe dimensions and standard steel density.

Q: Why does the API tubing and casing chart include mass gain or loss?
The chart includes mass gain or loss because end finishing and threaded connections change the actual pipe weight.

Q: What is drift diameter in an API tubing and casing chart?
Drift diameter is the minimum internal diameter that guarantees clearance for a standard drift mandrel.

Q: Are API tubing and casing charts dependent on steel grade?
API tubing and casing charts are independent of steel grade and define dimensions only, not mechanical properties.