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SERVICES

Rubber Linings

Koroseal

Marseal

Metal Fabrication

On Site

Design

Dual Laminate

KEY FACTS

Established in 1976

Worldwide Supplier

250 Years Combined Experience

FY2005 Revenue: $2.71 million

FY2005 Sales: $2.62 million

EM Rating for 2005: .76

RUBBER LINING SERVICES

 

SURFACE PREPARATION FOR RUBBER LINING

 

All surfaces to be rubber lined are sandblasted to a clean gray white metal surface finish with a 2.0 mil minimum profile for proper metal to rubber bond. All sandblasted areas will be checked for the proper surface profile using our Surface Profile Comparator. The surface is inspected prior to sandblasting for contamination; grease, oil, dirt, rust or other foreign matter. All foreign matter will be removed by buffing, burning or washing with solvent and will conform to the SSPC-SP1 specification. The blasted surface will conform to SSPC-SP5 (or NACE 1) specification for a white metal blast. The surface is also inspected for pits, crevices and pin-holes. If any are found, our metal shop can repair them. After blasting is complete, priming will begin a maximum of four hours after. Cements will be applied in a consistent manner to give a smooth, uniform coverage. Surfaces that are cemented will not be exposed to sunlight and/or weather.

 

Applying cement to blasted surfaces consist of three steps:

  • Metal Primer

  • Intermediate Cement

  • Tack Cement

Cements will be allowed enough drying time to form a dry or tacky film. All cemented parts or areas will be kept free from all contamination during the drying period.

 

APPLICATION OF RUBBER LINING

 

All procedures are followed as recommended by the rubber lining manufacturer.

 

After metal preparation is completed, the rubber lining is cut to the desired size and shape on a clean table. Once the desired size and shape is achieved, one side of the rubber lining is coated with tack cement and applied to the blasted and cemented surface. After the rubber lining material is applied, it is rolled down using steady and firm overlapping strokes with a roller of 2-1/2" maximum width. Care is taken not to stretch or apply tension to the rubber lining. The rolling action starts in the center of the lining material and is worked toward the edges. This is essential to remove any air out from behind the lining and ensure a proper bond is achieved. Rubber linings will be seamed together, if necessary, using either skive butt joints or lap joints. All seams will be offset.

 

CURING PROCESS

 

After application, the un-vulcanized rubber linings must be vulcanized or cured to ensure proper adhesion to the metal. Depending upon the composition of the lining and the size of the vessel, vulcanization can be achieved through one of these five methods:

  • Autoclave Cure

  • Internal Pressure Cure

  • Exhaust, or Atmospheric, Steam Cure

  • Hot Water Cure

  • Chemical Cure

AUTOCLAVE CURE

An autoclave cure provides the fasted, best and most uniform cure and should be used whenever possible

INTERNAL PRESSURE CURE

This method is used when a rubber lined component is too large to be placed in one of our autoclaves

EXHAUST, ATMOSPHERIC OR STEAM CURE

Exhaust, atmospheric or steam cure is normally used for field vessels that have open tops and/or bottoms or for vessels that will not withstand pressure.

HOT WATER CURE

This method of curing rubber involving filling a vessel with water and using steam to heat the water mass.

CHEMICAL CURE

This method involves applying Chemcure activator to chemical cure rubber and allowing it to dry. It is typically used for field repairs. Steam or other heat sources may be used to accelerate the curing process.

 

INSPECTIONS

 

Our rubber linings are subject to numerous inspections and testing, both pre-cure and post cure. At a minimum, all rubber lining will be tested and inspected for the following:

 

PRE-CURE INSPECTION

  • All linings will be visually inspected for proper adhesion and loose joints.

  • All linings will be visually inspected for blisters (trapped air), pulls, or surface defects.

  • All linings will be 100% spark tested using a properly calibrated spark tester to locate any possible pin-holes leaks.

POST CURE INSPECTION

  • All linings will be visually inspected for proper adhesion and loose joints.

  • All linings will be visually inspected for blisters (trapped air), pulls, or surface defects.

  • All linings will be 100% spark tested using a properly calibrated spark tester to locate any possible pin-holes leaks.

  • All linings will undergo durometer checks using a properly calibrated durometer gauge to ensure the rubber is cured per the specification.

HEADQUARTERS

8475 Bellingrath Road

Theodore, AL 36582

+1.251.653.5052

  +1.251.653.7367

info@industriallinings.com

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