How to USE API Ring Gage to Measure API Tubing &API Casing & API Line Pipe Couplings?
FYOU PMEC , One Stop Shopping for Threading and Gauging Solutions. The premier leader in providing the highest quality of API Oil Country Gauges, including API Working Gauges, API Master Gauges，API Ring Gage, API Plug Gage. But How to USE API Plug Gauges to Measure API Tubing &API Casing & API Line Pipe Couplings?
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API Specification 5B states that the required nominal standoff between the ring gage and the small end face of the pipe is 0, the ring gage should be flush to the small end face of the pipe. The tolerance on standoff is:
8TPI Tubing & Casing = ± 1P
10TPI Tubing = ± 1‐1/2P
Line Pipe (All Pitches) = ± 1P
The table below lists all of the size and pitch combinations and their corresponding standoff tolerance for each thread type
Note: Standoff information provided is based on nominal condition and is for reference only. API 5B requires that standoff to the pipe is adjusted/compensated by using the P1 value of your working ring as measured against a certified reference master gage. The standoff tolerance is then applied to the P1 value to determine the minimum and maximum standoff allowed. When available, this P1 value should be used in order to properly adjust the gage standoff in order to maintain compliance to API 5B.
Any question and request about the API Gauges Please contact: sales@fyougauges.com
