Rubber Expansion Joints

MIPR Corp Joint Types
MIPR Corp Molded Spherical Joints

Rubber Spool

  • Circulating Water & Raw Water Systems
  • Condensate Systems
  • High Pressure Water
  • Cooling Water Systems

Spherical Rubber

  • Sludge Lines
  • Air Service
  • Chillers

Molded Teflon/Teflon Lined

  • Corrosive Fluid Lines

Integral Molded Flanged Wide Arch

  • Plastic, FRP & Glass pipe

Fan/Duct Connectors

Style 240/242 Molded Spherical Joints

Spherical Molded Expansion Joints are designed for piping systems to absorb pipe movements, relieve stress, reduce system noise/vibration, compensate for misalignment/offset and to protect rotating mechanical equipment against start-up surge forces.

The molded style 240 single sphere and 242 twin sphere designed bellows are inherently stronger than the conventional hand-built style spool arch type. Internal pressure within a “sphere” is exerted in all directions, distributing forces evenly over a larger area. The spherical design “flowing arch” reduces turbulence and sediment buildup.

Features and Benefits:

Absorbs Directional Movement -Thermal movements appear in any rigid pipe system due to temperature changes. The Style 240 and Style 242 spherical arch expansion joints allow for axial compression or axial extension, lateral deflection as well as angular movement. (Note: Rated movements in this publication are based on single plane movements. Multiple movement conditions are based on a multiple movement calculation.

Easy Installation with Rotating Metallic Flanges -The floating metallic flanges freely rotate on the bellows, compensating for mating flange misalignment, thus speeding up installation time. Gaskets are not required with the Style 240 or Style 242, provided the expansion joints are mated against a flat face flange as required in the installation instructions.

Flange Materials/Drilling – Style 240 and Style 242 molded expansion joints are furnished complete with plated carbon steel flanges for corrosion protection. 304 or 316 stainless steel flanges are available upon request as well as ANSI 250/300 lb., BS-10, DIN PN10 & PN16 and JIS-10K drilling.

Absorbs Vibration, Noise and Shock – Style 240 and Style 242 molded expansion joints effectively dampen and insulate downstream piping against the transmission of noise and vibration generated by mechanical equipment. Noise and vibration caused by equipment can cause stress in pipe, pipe guides, anchors and other equipment downstream. Water hammer and pumping impulses can also cause strain, stress or shock to a piping system. Install the Style 240 or Style 242 molded expansion joints to help compensate for these system pressure spikes.

Wide Service Range with Low Cost – Engineered to operate up to 300 PSIG or 265°F, the Style 240 and Style 242 can be specified for a wide range of piping requirements. Compared to conventional hand-built spool type joints, you will invest less money when specifying the mass-produced, consistent high quality, molded single or twin sphere expansion joints.

Material Identification – All Style 240 or Style 242 molded expansion joints have branded elastomer designations. Neoprene Tube/Neoprene Cover (NN) and Nitrile Tube/Neoprene Cover (NP) elastomer designated joints meet the Coast Guard Requirements and conform to ASTM F1123-87. 240C/NP-9 joints have ABS certification.

Large Inventory – MIPR Corp maintains one of the largest inventories of rubber expansion joints in the world. Please contact us for price and availability.

MIPR Corp Notes:

All Expansion Joints are reinforced with Nylon Tire Cord, except 240-A and 240-C which arereinforced with Polyester.

1. All NN & NP elastomer designated joints meet the Coast Guard Requirements and conform to ASTM F 1123-87 and are marked accordingly.

2. Branding Label will be marked as “Food Grade”.

3. BB, EE or EE-9 are good for 300°F blower service at 20 PSI or less.

4. 240-A & 240-C expansion joints have black EPDM tube, but are FDA compliant.

5. EE-9 joints are peroxide cured.

6. NP-9 joints have ABS certification.

7. Elastomers are in accordance with NSF/ANSI 372, File MH47689 Und. Lab. Classified.

8. All elastomers above are not intended for steam service.

9. For PTFE lined single sphere.

10. For 240A & 240C Rubber Joints, Vacuum Support devices are available. Published movements will be reduced by approximately 50% for this option.

11. Series 240AV,D,E&M + 242A,B&C In Elastomers EPDM & Neoprene are all listed for low lead content in accordance with NSF/ANSI 372

Rubber bellows and expansion joints are designed for piping systems to absorb pipe movements, relieve stress, reduce system noise and vibration, compensate for misalignment or offset and to protect rotating mechanical equipment against start-up surge forces.

Series 231 Rubber Expansion Joint Catalog
Series 232 Rubber Expansion Joint Catalog
Series 233 Rubber Expansion Joint Catalog
Series 233L-243L Rubber Expansion Joint Catalog
Series 240 Rubber Expansion Joint Catalog
Series 271 Rubber Expansion Joint Catalog
Series 231 PTFE Lined Rubber Expansion Joint Catalog
Series 251 PTFE Lined Rubber Expansion Joint Catalog
Series 300 Rubber Pipe Connector Catalog
Series 440 PTFE Molded Expansion Joint Catalog
Series 500 Fan Connectors Catalog

Applications

Chemical-Petrochemical Piping Systems, Industrial Process Facilities, Marine Services, Pollution Control Systems, Power Generating Plants, Pulp & Paper Systems, Steel Mills, Water/Wastewater & Sewage

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