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Measuring RTJ (Ring-Type Joint) Ring groove on flanges. 

Measuring the pitch diameter of the Ring joint groove face, 

measuring the flange valve and pipe flange's diameter.

With presetting function, easy to measure the origin-setting.

Pitch diameter=(ID+OD)/2

 A ring groove is a closely dimensioned groove cut into the face of a pipe flange. Together with a gasket, a groove helps create a seal between parts, so it is important that a groove meets designated specifications.

API 6A ring grooves are divided into three ring types, BX, R, and RX. Each type has different configurations and is designated by the type and a number, i.e., BX 150, R 41, etc.

API mandates the inspection of ring grooves. The necessary dimensions of a groove are clearly specified in API 6A. To pass API requirements, these dimensions must be met. For BX Grooves, the groove’s major diameter and width are specified. For R and RX Grooves, API specifies the groove’s pitch diameter and width.

API 6A Seal Ring Groove Width Setting Standards

Of course, we can offer other angle’s standards as well