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January 20, 2021

What are Single Ply Metal Bellows and where are they used?

Single ply bellows are made up of a single tube (or ply) of sheet metal of a defined thickness.

Single Ply Bellow
Why are they better than multi-ply bellows?
  • The Expansion joint offers a simple construction and lower manufacturing.
  • They offer a higher pressure capacity compared to multi-ply expansion joints of a similar combined thickness
  • They more stable and less susceptible to in-plane and column squirm.
  • They are more resilient to corrosion due to their thicker wall.
What are the drawbacks?
  • They are generally stiffer than multi-ply bellows, which means they need more axial force per unit compression.
  • They have lower cycle life compared to a multi-ply bellows of similar wall thickness.
  • Preventive leak detection is not possible in many cases.
  • Longer convoluted lengths / taller convolutions are required compared to multi-ply bellows to provide similar movement compared to multi-ply bellows.
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Ebenesh Rabiraj0 commentJanuary 20, 2021Metal Bellows
High Temperature piping Expansion Joints
December 11, 2020

Hinged and Gimbaled piping Expansion Joints for a Natural Gas Fired Heater

High-Pressure High-Temperature piping Expansion Joints for a Natural Fired Heater at a US AFB.

  • Design pressure of 1,300 Psi and design temperature of 1,250 F.

  • Hydrotest at 1,900 Psi

Bellows Systems designed and manufactured one hinged and two gimbal expansion joints for a recent project. The gimbal type expansion joints included one with an external cover and removable insulation.
The bellows materials included Inconel 718 alloy construction with integral root rings and collars. Hinge and Gimbal structural components included 304 SS and 347H SS.

Hinged bellows were designed to be capable of 7 degrees of angular rotation at design temperature and pressure.

Bellows Systems is your go-to source for the standard to the most challenging bellows and expansion joint applications.

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Alpha Mahatvaraj0 commentDecember 11, 2020Expansion Joints, Oil and Gas
High Pressure Universal Tied Expansion Joint
October 15, 2020

High Pressure Universal Tied Expansion Joint

Bellows Systems shipped another High Pressure Universal Tied Expansion Joint for a process plant piping application. The Expansion Joint had full Stainless Steel 316/ 316L construction & was designed per EJMA 10th Edition & ASME B31.3.

Our expansion joints are used in both the pulp line and chemical recovery process. Check our expansion joints for our complete line up of products or chat with one of our experienced sales and engineering staff to find the right solution for you.

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Alpha Mahatvaraj0 commentOctober 15, 2020Expansion Joints
Exhaust compensator for a LPG Tanker
October 8, 2020

Exhaust compensator for a LPG Tanker

Recently we received an urgent request for replacement of the main engine (MAN B&W 8S35MC) exhaust compensator (bellows expansion joint) for a LPG Tanker en-route to Houston. Bellows Systems designed, fabricated and delivered the replacement 4-ply exhaust expansion joint within 5 days. Drop-off and pick-up was successfully completed during the vessel’s Houston port call.

We also provide quick turn around repair services on exhaust bellows and expansion joints to vessels calling into port of Houston or Galveston.

Make Bellows Systems your go to source for emergency repairs or rebuilds of exhaust bellows and expansion joints. Call us today to find more about our repair services.

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Alpha Mahatvaraj0 commentOctober 8, 2020Expansion Joints
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