Standard Roll Groove for Large Diameter IPS Pipe
Standard Roll Groove for BS1387 (ISO 65) Carbon Steel Pipe
Pipe OD (Column 2):
Maximum allowable tolerances from square cut ends is 0.060’’.
Gasket Seating Surface (Column 3):
The gasket seating surface shall be free from deep scores, marks, or ridges that could prevent a positive seal.
Groove Width (Column 4):
Groove width is to be measured between vertical flanks of the groove side walls.
Groove Diameter (Column 5):
The “C” diameters are average values. The groove must be of uniform depth around the entire pipe circumference.
Minimum Wall Thickness (Column 6):
The “t” is the minimum allowable wall thickness that may be roll-grooved.
Groove Depth (Column 7):
The “d” is for reference use only. The groove dimension shall be determined by the groove diameter “C”.
Flare Diameter (Column 8):
The pipe end that may flare when the groove is rolled shall be within this limit when measured at the extreme end of the pipe.

Standard Roll Groove for BS1387 (ISO 65) Carbon Steel Pipe
Pipe OD (Column 2):
Maximum allowable tolerances from square cut ends is 0.060’’.
Gasket Seating Surface (Column 3):
The gasket seating surface shall be free from deep scores, marks, or ridges that could prevent a positive seal.
Groove Width (Column 4):
Groove width is to be measured between vertical flanks of the groove side walls.
Groove Diameter (Column 5):
The “C” diameters are average values. The groove must be of uniform depth around the entire pipe circumference.
Minimum Wall Thickness (Column 6):
The “t” is the minimum allowable wall thickness that may be roll-grooved.
Groove Depth (Column 7):
The “d” is for reference use only. The groove dimension shall be determined by the groove diameter “C”.
Flare Diameter (Column 8):
The pipe end that may flare when the groove is rolled shall be within this limit when measured at the extreme end of the pipe.
Pipe OD (Column 2):
Maximum allowable tolerances from square cut ends is 0.03’’ for size up to 3 1/2’’; 0.045’’ for 4’’ thru 6’’; and 0.060’’ for size 8’’
and above.
Gasket Seating Surface (Column 3):
The gasket seating surface shall be free from deep scores, marks, or ridges that could prevent a positive seal.
Groove Width (Column 4):
Groove width is to be measured between verƟcal flanks of the groove side walls.
Groove Diameter (Column 5):
The “C” diameters are average values. The groove must be of uniform depth around the entire pipe circumference.
Minimum Wall Thickness (Column 6):
The “t” is the minimum allowable wall thickness that may be roll-grooved.
Groove Depth (Column 7):
The “d” is for reference use only. The groove dimension shall be determined by the groove diameter “C”.
Flare Diameter (Column 8):
The pipe end that may flare when the groove is rolled shall be within this limit when measured at the extreme end of the pipe

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