Technical Awareness Bulletins


Technical Awareness Bulletins deliver quick answers that save MTI member companies time and money. As a service to both MTI members and the industry, MTI continues to create informative technical bulletins on the industry’s hottest topics, from materials selection and welding to corrosion under insulation and failure analysis, and much more. 

Technical Bulletins are available to members in the e-Library and can be downloaded to edit for your company needs.

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Bulletin #1
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Focus on Stress Corrosion Cracking

The subject of stress corrosion cracking (SCC) is extensive. The focus of this issue is to discuss, in simple terms, some of the pertinent information.

Bulletin #4
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Pickling and Passivation in Stainless Steel
Pickling and passivation are chemical treatments applied to remove contaminants and assist in the formation of a continuous passive film.
Bulletin #7
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Corrosion Under Insulation
Corrosion under insulation (CUI) is the corrosion or corrosion-related cracking that occurs under insulation and/or fireproofing. It is a major problem in all parts of the chemical processing industry.
Bulletin #9
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Coated Heat Exchanger Tubes
Coated tube bundles could potentially provide considerable savings on maintenance and production.

Bulletin #10
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Water Treatment - Closed Cooling Systems
A closed cooling water system is one in which there is no make-up after the initial charge and no blowdown. These systems are used primarily when precise control of temperature or water purity is necessary.

Bulletin #11
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Alloying Elements in Stainless Steel
Stainless steel is iron alloyed to chromium with certain elements to give the finished metal required properties. Cost is minimized by controlling the percentages of alloying elements yet maintaining required properties.

Bulletin #14
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Metal Specifications
In today’s chemical companies, emphasis on process safety management is crucial. It is necessary to avoid getting less than the desired material on a requirement. When there are 20 or more alloys associated with one trade name, getting material fully specified can prevent failures.

Bulletin #27
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Polythionic Acid Stress Corrosion Cracking
Polythionic acids are a concern for refineries and petrochemical plants due to the extremely rapid intergranular stress corrosion cracking that can occur in equipment during shutdowns, startups or during operation when air and moisture are present.

Bulletin #36
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PTFE Expansion Joint
For most of the components in use in chemical plants, such as vessels, columns, piping, valves, seals, hoses, and expansion joints, industry Recognized and Generally Accepted Good Engineering Practices (RAGAGEPs) concerning life cycle and integrity issues exist. Expansion joints, also called compensators or bellows, normally compress rather than expand and provide the necessary stress relief from thermal and mechanical forces, such as movements and vibrations during normal operations.

Bulletin #37
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Venting of PTFE Lined Pipe and Equipment
Studies have shown that PTFE vent coupling inserts help in channeling corrosive permeants away from the steel housing. They also help to avoid vent holes from plugging by corrosion products and by painting.