Home Sistem perpipaan Vibration eliminator for marine piping

Vibration eliminator for marine piping

- Advertisement -

Piping runs require careful alignment through the proper use and location of anti-vibration elements, expansion joints along with pipe supports, pipe shoes, and guides. These basic requirements will make sure that the installed pipework will carry the liquids safely and without leaks.

Overview of Pipe Installation Techniques

I was an engineer at sea for many years, spending my last twenty years before retirement as a project Engineer in the offshore oil and gas construction yards.

Whether working as engineer at sea or commissioning equipment on the oil platforms, I always investigated any vibrating pipework with some urgency. The problem was normally pipe support clamps working loose, spring hangers or machinery anti-vibration mountings (AVM’s) needing re-adjustment, or machinery coupling misalignment.

The urgency to find the cause was due to the damage that could be done to the piping runs: cracked pipes, leaking flanges, or malfunction of associated equipment.

Piping installation is a specialist trade and should be left to the piping engineer and his team of pipe-fitters, however most mechanical/production engineers are familiar with the basics that follow.

Pipes are fabricated to isometric drawings and full material traceability of the pipe and pipe fittings is required by piping standards. Once fabricated the pipes are painted prior to being fitted as per the installation drawings. If the fluids being carried in the pipe are subjected to temperature fluctuation, expansion bends will be incorporated along with expansion bellows or expansion gimbals that allow the safe expansion and contraction of the pipework.

Pipe guides and shoes are fitted to the pipe to ensure the piping remains axially aligned, with the spider type being the most popular and reliable type.

Piping Vibration Analysis

Before we examine the various types of anti-vibration components available to engineers, it is important that we have a quick look at vibration analysis and management.

The analysis comprises of running up the pumps supplying the piping to achieve the optimum pressure and temperature setting. A vibration monitor/transducer that records the frequency and acceleration of motions is attached securely to the pipe and a measurement taken and recorded. This is repeated at different locations every 12’ or so along the pipe run determining the pipe motions in the X, Y, and Z axis.

A sketch showing the location of the tranducer along with the location of flanges, pipe supports and any expansion/anti-vibration components is then drawn. This may be done manually (in my day) or automatically, depending on accessories incorporated within the more modern transducer.

A typical sketch for to produce the vibration analysis manual modular plot is shown below, along with a section of a manual recording sheet. (Please click on image to enlarge.)

Types of Modern Anti-vibration Components Used in Piping Installations.

There are two basic categories of anti-vibration components, these being in-line and hanging.

1. In-line Devices

  • Bellows

These consist of a set of accordion-like steel bellows that are designed and rated for different weights of piping. The bellows are encompassed between two flanges used to bolt the component into the piping run. An example of this is shown below :

Typical installation of steel bellows in sert piece used to eliminate pipe vibration
Typical installation of steel bellows in sert piece used to eliminate pipe vibration

  • Rubber Molded Section

This comprises an oval molded section between two flanges that are used to bolt the component into the pipework. The molded rubber protrudes through the flanges and is used as a gasket. A typical application is shown below :

Typical installation of molded rubber insert piece used to eliminate pipe vibration
Typical installation of molded rubber insert piece used to eliminate pipe vibration

2. Hanging Devices

  • Sprung Hanger

The device is designed to incorporate a pipe support and clamp. The springs are rated for various types of pipe anti-vibration control, being adjustable through a set of locknuts on the threaded bar hangers. A typical example is shown below :

Typical installation of spring hanger pipe support used to eliminate pipe vibration
Typical installation of spring hanger pipe support used to eliminate pipe vibration

  • Spring Compensating

This design also incorporates a pipe support, but only one spring is used between the structure and the piping. The compensating spring is held within a casing and is adjustable using bottle screws or some such method. These are available in numerous ratings to suit most piping applications, and a typical application is shown below :

Arrangement of spring compensator pipe vibration eliminator
Arrangement of spring compensator pipe vibration eliminator

- Advertisement -
Indonesia Marine Equipmenthttp://inameqhome.wordpress.com
INAMEQ is provide all marine product (equipment and sparepart) and news about marine product to help procurement team at shipping industry, ship contractor, port contractor and oil gas company finding competitive price to directly connect with manufacturer and authorized local and international.
- Advertisement -

Stay Connected

16,985FansLike
2,458FollowersFollow
61,453SubscribersSubscribe

Must Read

Speed Sensor Noris Automation For Ship Application

Non-contacting multi-channel speed sensor, Hall principleFA54Robust and high quality housing: IP68 pressure-tight. Excellent vibration and shock resistance. ...
- Advertisement -

Speed Sensor For Ship Application

Non-contacting multi-channel speed sensor, Hall principleFA54Robust and high quality housing: IP68 pressure-tight. Excellent vibration and shock resistance. ...

Escher Wyss Controllable Pitch Propellers

Escher Wyss Controllable Pitch Propellers (CPP), provided by ANDRITZ Hydro, deliver outstanding performance for naval and Coast Guard vessels, mega yachts, and many other...

Cara pemakaian kayu pokhout untuk kapal

Bantalan poros propeller yang biasa dipakai di kapal umumnya terdiri atas tiga macam yaitu bantalan poros propeller yang terbuat dari karet, white metal (besi...

Related News

Speed Sensor Noris Automation For Ship Application

Non-contacting multi-channel speed sensor, Hall principleFA54Robust and high quality housing: IP68 pressure-tight. Excellent vibration and shock resistance. ...

Speed Sensor For Ship Application

Non-contacting multi-channel speed sensor, Hall principleFA54Robust and high quality housing: IP68 pressure-tight. Excellent vibration and shock resistance. ...

Escher Wyss Controllable Pitch Propellers

Escher Wyss Controllable Pitch Propellers (CPP), provided by ANDRITZ Hydro, deliver outstanding performance for naval and Coast Guard vessels, mega yachts, and many other...

Cara pemakaian kayu pokhout untuk kapal

Bantalan poros propeller yang biasa dipakai di kapal umumnya terdiri atas tiga macam yaitu bantalan poros propeller yang terbuat dari karet, white metal (besi...

Aplikasi pemakaian kayu pokhout di kapal

Bantalan poros propeller yang biasa dipakai di kapal umumnya terdiri atas tiga macam yaitu bantalan poros propeller yang terbuat dari karet, white metal (besi...
- Advertisement -

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.