What is STC pipe?
What is STC pipe?
Casing pipe with long threads is the commonly used in the oil and gas industry. STC (Short threading) STC coupling can withstand strength of the tubular 60~80% of the pipe tensile, BTC coupling can hold more tensile but it’s sealing performance is poor under circumstance like high internal pressure.
What is an API thread?
Threads are used as mechanical means to assemble and hold the mating joints together during axial tension or compression. All casing threads are not designed or intended to be leak resistant when made up. Information on casing and tubing thread dimensions can be found in API Spec.
What is 8rd thread?
2017.04.28. The most common type of casing connection in use is the API 8-rd connection, where 8-rd means 8-round or eight threads per inch and a slightly rounded profile. The profile is a V or wedge-shape but slightly rounded at the crest and valleys of the threads. There is also an API 11.
Are API and NPT threads the same?
This may be a bit late for your requirements, but here goes: in my experience many engineers equate API (line pipe threads) & NPT as one and the same. They are not. The API standard (from memory) highlights a few variations on the taper length, which would not be compatible with a standard NPT dimension.
What kind of thread is used for STC?
STC thread type. It is features with a non-runout design of round thread. Each has eight round crested threads per inch. STC threads can withstand strength of the tubular 60% to 80% of the pipe strength. STC thread is a good choice for shorter length casing applications that do not involve high axial loads or bending.
How are the threads used in a casing pipe?
Threads are used as mechanical means to hold the neighboring joints together during axial tension or compression. For casing pipe, the most popular threading type is LTC (Long thread coupling), STC (Short thread coupling) and BTC (Buttress thread coupling).
What kind of casing does steel tubular products use?
We manufacture a complete range of API-certified connections. U. S. Steel Tubular Products manufactures a complete range of American Petroleum Institute (API) certified casing thread types, including short round thread casing (STC), long round thread casing (LTC) and buttress thread casing (BTC).
When to use STC or LTC casing?
STC is a good choice for shorter length casing applications that do not involve high axial loads or bending. LTC is well suited for situations where some axial load is encountered but overall well conditions do not include extremes of temperature or pressure.
