Introduction to Hose Couplings

A hose coupling is a connector that connects a hose to another hose or tap of sprinkler systems or equipment. They are manufactured in different varieties and widely used in water, chemical, and oil & gas industries. Depending on service requirement hose couplings are made of various materials like brass, steel, stainless steel, aluminum, or plastic. The purpose of this article is to provide brief information about different types of hose couplings which are used in oil & gas applications.

Purpose of Hose Couplings

Couplings can be used in various conditions like:

  • For loading & unloading tanker connection.
  • For purging as well as flushing connection.
  • In fire fighting network
Purpose of Hose Couplings
Fig. 1: Purpose of Hose Couplings

Different Types of Hose Couplings: 

Following types of Hose Couplings are widely used:

  • Elaflex
  • TODO
  • Cam and Groove (Camlock) Couplings
  • Avery Hardoll dry-break couplings &
  • Carter couplings

Let me show 1 by 1 in detail.

Elaflex Couplings:

These hose couplings are produced by Elaflex and are used in petrol station equipment, Tank truck equipment, Aircraft refueling, chemical and pharma industries, LPG refueling, Marine applications, Rail Tankers, and Oil & Gas applications. Main features of Elaflex hose couplings are

  • Elaflex hose coupling sizes – ½” to 4”
  • Type of pipe connection – threaded & flanged
  • Available Pressure classes – 150# & 300# (Working pressure up to 25 bar)
  • The material of construction of the Elaflex coupling – Brass (for non-sour service), SS (for sour service)
  • Manufacturing Std. – API RP 1004 / EN 14420
Typical figure of Ela Flex Coupling
Fig. 2: Typical figure of Ela Flex Coupling

TODO Coupling:

  • Available sizes – 3/4” to 6”
  • Type of pipe connection – threaded & flanged
  • Pressure class – 150# & 300# (Working pressure up to 25 bar)
  • The material of Construction – Brass, SS, Aluminium, Hastelloy C & other on request
  • Manufacturing Std. – EN 13480 and EN 13445
  • TODO couplings are used for tanker unloading connection into a tank/vessel, because of the integral check valve.
  • Elaflex couplings are used for tanker loading connection from a tank/pit.
Typical figure of TODO Coupling
Fig. 3: Typical figure of TODO Coupling

Cam & Groove (Camlock) Couplings:

  • Available sizes – 1/2” to 6”
  • Type of pipe connection – threaded
  • Pressure class – 150# (Working pressure up to 17 bar)
  • The material of Construction – Brass, SS & Aluminium
Typical figure of Camlock Couplings.
Fig. 4: Typical figure of Camlock Couplings.

Carter Couplings:

Carter Couplings are used in the following applications:

  • LNG tanker refueling
  • Aircraft refueling
Figure of Carter Couplings
Fig. 5: Figure of Carter Couplings

Here are Some More Resources for You

Piping Design and Layout
Piping Stress Anlysis
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Piping Design Software
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References:

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Anup Kumar Dey

I am a Mechanical Engineer turned into a Piping Engineer. Currently, I work in a reputed MNC as a Senior Piping Stress Engineer. I am very much passionate about blogging and always tried to do unique things. This website is my first venture into the world of blogging with the aim of connecting with other piping engineers around the world.

One thought on “Introduction to Hose Couplings

  1. Nice to read your blog regarding hose couplings.The types of coupling for different types hose pipe is very important.

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