STANDARD CUT-GROOVE SPECIFICATION

Notes:
1. Pipe ends to be square cut and shall be neat and free from imperfections that may affect durability, operability and safety.

2. Metal shall be free from fins, burrs and sharp/rough edges, flame cutting is not permitted.

3. Break all corners 0.01 - 0.03 in. chamfer unless otherwise specified.

4. In the event of a conflict between these notes and references cited in the drawings, except for detail specifications, these notes shall take precedence

 

 

Column Notes:
Gasket seat ‘A’: must be smooth and free of indentations, roll marks, scratches, imperfections and projections from the end of the pipe to the groove in order to provide a proper sealing surface. Dimension ‘A’ to be measured from square-cut end of pipe. Beveled end pipe not recommended.

Groove Width "B": The bottom of the groove to be free of dirt, chips etc. that may interfere with coupling assembly. See radius notes on drawing above.

Groove Depth "D": must be of uniform depth for the entire pipe circumfrence and must be maintained within the 'C' dimension tolerance listed.

Min . Wall Thickness "T": For information only. Actual dimensions must be per groove diameter ‘C’.

STANDARD ROLLED-GROOVE SPECIFICATION

Notes:
1. Pipe ends to be square cut and shall be neat and free from imperfections that may affect durability, operability and safety.

2. Metal shall be free from fins, burrs and sharp/rough edges, flame cutting is not permitted.

3. In the event of a conflict between these notes and references cited in the drawings, except for detail specifications, these notes shall take precedence

 

 

Column Notes:
Gasket seat ‘A’: must be smooth and free of indentations, roll marks, scratches, imperfections and projections from the end of the pipe to the groove in order to provide a proper sealing surface. Dimension ‘A’ to be measured from square-cut end of pipe. Beveled end pipe not recommended.

Groove Width "B": The bottom of the groove to be free of dirt, chips etc. that may interfere with coupling assembly. See radius notes on drawing above.

Groove Depth "D": must be of uniform depth for the entire pipe circumfrence and must be maintained within the 'C' dimension tolerance listed.

Min . Wall Thickness "T": For information only. Actual dimensions must be per groove diameter ‘C’.

 

 

 

 

 

 

 

PIPE END SEPARATION AND ALLOWABLE DEFLECTION

Above separation and deflection figures are for roll-grooved pipe. Figures for cut-grooved pipe maybe doubled. Above deflection figures are field maximums. For design purposes, delections should be reduced by 50% for small sizes (< 4") and 25% for larger sizes. 

 

Allowable Pipe End Separation

 

 

GASKETS

A complete coupling consists of coupling housings, nuts, bolts and gasket. The coupling housing contains and compresses the gasket, which effects proper sealing of the joint. Piedmont Pacific gaskets are designed for a tight seal in high pressure industrial applications.

Gaskets materials NSF Approved ANSI 91: Piedmont Gaskets are EPDM (ethylene propylene diene monomer) rubber.

Temperature range: -30F to 230F (-29C to 110C)

Service recommendations: Hot water service within the temperature range, seawater and brinewater, diluite acids, oil-free air and many chemical services. Potable water. NOT SUITABLE FOR PETROLEUM SERVICES.

For other services, please contact Piedmont Pacific

We offer two shapes of gaskets, C-shaped and Flush-fit. The Flush-fit type is recommended for vacuum service. The inner lip minimizes turbulence in high-velocity applications.

 

Gasket Overview

C-SHAPED GASKET (STANDARD)

FLUSH-FIT GASKET