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R-88/R-88N Ring Joint Coupling Download PDF



MODEL R-88 RING JOINT COUPLING

Shurjoint R-88 Ring Joint Coupling Installation Instruction video

The Shurjoint Model R-88 Ring Joint Coupling is an ideal pipe joining method when pipe is difficult to groove or when grooving is not the preferred joining method. Available in sizes 8” to 96” the R-88 offers ease of use and excellent performance.

The Shurjoint Model R-88 Ring Joint Coupling is supplied with a pair of factory supplied weld rings. For installation weld a ring on each pipe end to be connected, next mount the rubber gasket over the pipe ends, place coupling segments over the gasket and fasten the bolts and nuts.

R-88 couplings should always be installed so that the coupling bolt pads make metal to metal contact. 

The Shurjoint R-88 Ring Joint Coupling is considered a shouldered coupling with the factory supplied weld rings serving as the joint shoulders. The R-88’s performance standards meet and or exceed the requirements of ASTM F1476 and AWWA C606. The factory supplied weld rings offer a much more economical and installation friendly alternative to that of traditional shoulder rings, including Type A, B, C, D, E, and G rings.

The R-88 coupling can also be used on stainless steel pipe with optional weld rings available in compatible stainless steel grades. Check with Shurjoint for details and availability.

Typical applications include:

• Water & Waste Water Treatment Plants 
• Mining & Tunnel Boring
• Pulp & Paper                        
• Hydroelectric Plants
• Co-Gen Electric Plants               
• Food & Beverage
• Compressed Air
• HVAC

MODEL R-88 / R-88N RING JOINT COUPLING

The Shurjoint Model R-88 Ring Joint Coupling is available in sizes 8” / 200 mm and above. 
Sizes 14” / 350 mm to 26” / 650 mm are now available in a two-segment style (R-88N). The 
two-segment style offers an easier and faster installation. 


 
Note:
Dimensions are subject to change without notice.  Other sizes are available on request.
*Working Pressure and End Load are the total from all internal and external loads based on the applicable pipe wall thickness.
**Working Pressure is based on rings both sides fully welded standard wall carbon steel pipe. 
†Allowable Axial Displacement and Angular Movement (Deflection) figures shown are the maximum nominal range of movement at each
R-88 coupling joint when rings are welded in the standard position.  For design and installation purposes these figures should be reduced by 25%.
♁10mm shoulder rings are acceptable.
‡The number of ring clamps listed is the minimum required to correctly position the weld ring around the circumference of the pipe end. 
 
MODEL R-88 RING JOINT COUPLING(Large Diameter)

The Shurjoint Model R-88 Ring Joint Coupling is available in sizes 28” / 700 mm to 96" / 2400 mm. The larger diameter couplings are comprised of 6 to 8 housing segments depending on the size and feature two bolts at each joint segment to ensure a positive connection.

Note:
Dimensions are subject to change without notice.  Other sizes are available on request.
*Working Pressure and End Load are the total from all internal and external loads based on the applicable pipe wall thickness.
**Working Pressure is based on rings both sides fully welded standard wall carbon steel pipe. 
†Allowable Axial Displacement and Angular Movement (Deflection) figures shown are the maximum nominal range of movement at each
R-88 coupling joint when rings are welded in the standard position.  For design and installation purposes these figures should be reduced by 25%.
‡The number of ring clamps listed is the minimum required to correctly position the weld ring around the circumference of the pipe end.

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