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2. Pipe drift - Wikipedia

   en.wikipedia.org/wiki/Pipe_drift

   Pipe drift is a measure of the roundness or eccentricity of the inside wall of a pipe. "API drift" refers to primary specifications set forth in API Specification 5CT (ISO 11960), "Specification for Casing and Tubing". "Alternate drift" refers to alternate drift specifications listed in API 5CT.

3. Ring gauge - Wikipedia

   en.wikipedia.org/wiki/Ring_gauge

   A ring gauge, or ring gage, is a cylindrical ring of a thermally stable material, often steel, whose inside diameter is finished to gauge tolerance and is used for checking the external diameter of a cylindrical object. [1] Ring gauges are used for comparative gauging as well as for checking, calibrating, or setting of gauges or other standards ...

4. Gauge (instrument) - Wikipedia

   en.wikipedia.org/wiki/Gauge_(instrument)

   a cylindrical ring of steel whose inside diameter is finished to gauge tolerance and is used for checking the external diameter of a cylindrical object. Strain gauge: a device used to measure the strain of an object. Thread pitch gauge, also called a threading gauge, pitch gauge, or screw gauge a device used to measure the pitch or lead of ...

5. Metal hose - Wikipedia

   en.wikipedia.org/wiki/Metal_hose

   An important variant of the metal hose can be attributed to the inventor Siegfried Frank of Frankfurt, Germany. In 1894, he patented the method of rolling a helical corrugation into a smooth rigid pipe. Witzenmann had already made experiments in this direction several years earlier, but did not continue his efforts to create a patentable result.

6. Bore gauge - Wikipedia

   en.wikipedia.org/wiki/Bore_gauge

   That is the diameter of the component. Repeat the procedure in 3 different places and get the average value of the diameter of the component. This is the most common way to measure the larger bore. It is available in different ranges; normally you can use this from 300 mm to 4000 mm for external diameter.

7. Corrugated stainless steel tubing - Wikipedia

   en.wikipedia.org/wiki/Corrugated_stainless_steel...

   Corrugated stainless steel tubing (CSST) is tubing made of stainless steel with corrugation on the inside or outside. CSST is not FAC (Flexible Appliance Connector) tubing. Presently, CSST and FAC tubing both use corrugated stainless steel tubing. In the past, FAC used corrugated brass tubing. However, FAC tubing is made only in lengths of 1 to ...