Dresser Coupling Style 38 vs Style 40: Key Differences & Installation Videos

Trupply is one of the largest distributor of Dresser Couplings in USA. We carry the entire line of Dresser Water and Waste-Water Pipeline Product in our online catalog. Products are shipped the same day from our warehouse in Houston TX.

At Trupply, we believe in educating our customer on the products we carry. Our knowledge central section of the website carries a lot of information on the products we sell.

What Is a Dresser Coupling Used For?

Dresser introduced its first coupling over 100 years ago. Since then Dresser has expanded it’s repair product line to include Dresser Clamps and weldable Dresser Sleeves for the water and industrial markets.

Dresser couplings are commonly used for pipeline repairs, axial movement compensation, vibration control, and joining pipes without welding. For today’s pipeline integrity repairs, Dresser coupling style 38 and style 40 offers a convenient way to repair pipe where a pipe can be slid inside the coupling and restore full pressure integrity.

Dresser Coupling Types: Style 38 and Style 40 Explained

The main difference between a Dresser Clamp and a Dresser Coupling is that Dresser Clamp offers wrapping ability, however, with lower pressure rating. Dresser Coupling on the other hand, allows full-integrity pipe joint that is as good as the pipe itself.

Dresser Coupling Style 38 and Style 40 are selected based on repair length, installation requirements, and pipe movement conditions. Style 40 couplings are available in longer lengths, up to 24 inches, making them suitable for repairing larger damaged sections of pipe.

Key Benefits of Dresser Couplings

Some of the practical benefits of using Dresser Couplings in water and industrial piping systems include:

• Eliminate vibration damage: Seal inside the dresser coupling allows vibration dampening. This is very useful in case of pipe joints near pumps & compressors.
  
  
• Eliminate pipe damage due to thermal expansion and contraction: Dresser coupling allows for slight movement axially to compensate for thermal expansion and contraction. This prevents cracks & buckling damage on pipes.
  
  
• Repair pipe without welding: Why weld when you can install dresser coupling? There are many hazardous area application where hot work permit is not an option and Dresser Coupling offers an equally viable alternative to repair the pipe.
  
  
• Allow for axial misalignment: Dresser coupling style 38 and style 40 allows for slight misalignment in the pipe. Dresser gasket will allow installation in a pipe that is not perfectly aligned and still work with full pressure integrity.
  
  
• Repair longer sections of pipe damage: Style 38 Dresser Coupling and Style 40 Dresser coupling allows repair of larger sections of damaged pipe. Style 40 coupling is available in lengths up to 24 inch. Several contractors use two style 38 or style 40 coupling with a pipe in the middle to repair even larger sections of damaged pipe.
  
  
• Easy maintenance: Style 38 and style 40 coupling allows you to join your equipment such as pump or compressor with a coupling instead of a welded joint (like a flange). This is especially very handy for regular maintenance of the main equipment. Dresser also makes a special coupling that has a flange end (Style 128 flange adapter).

Dresser Coupling Installation and Application Videos

Below are videos covering Dresser Coupling overview, installation steps, and component details. These videos are intended to support field installation and maintenance planning.

Dresser Coupling Overview

Dresser Coupling Style 38 & Style 40 in-depth analysis

How to install Dresser Coupling

Dresser Coupling Gasket overview

If you have any question about Dresser Couplings or want to place order, call us at 281-516-8100 or email sales@trupply.com

FAQs

1) What is a Dresser coupling used for?

Dresser couplings are used for pipe repair, vibration control, thermal movement compensation, and joining pipes without welding.

2) What is the difference between Dresser Coupling Style 38 vs Style 40?

Style 38 is commonly used for shorter pipe repairs, while Style 40 supports longer repair lengths and larger damaged sections.

3) How is a Dresser coupling installed?

The coupling slides over the pipe ends and is tightened to seal the joint, eliminating the need for welding or hot work.

4) What are the main types of Dresser couplings?

Common types include Style 38, Style 40, clamps, sleeves, and flange adapters used in water and industrial pipelines.