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What is Milspec and its relation to vacuum impregnation and sealants?

Posted by Han Sim on Thu, Jun 07, 2012 @ 01:00 PM

This is the first in a series of articles to discuss Milspec and how it relates to the vacuum impregnation and sealant industry.

In the late 18th century and throughout the 19th century, the American and French militaries were early sponsors and advocates of interchangeability and standardization. By World War II, virtually all national militaries had some form of standardization.

Today, the United States Defense Standard, often called the Military Standard or more commonly known as Milspec, is used to help standardize objectives by the United States Department of Defense. Benefits of this standardization ensure that products meet or exceed requirements and military or defense objectives and applications. Due to the stringent standards of requirements, non-defense government organizations, technical organizations, and industry in general began to adapt certain Milspecs and standards.

The impregnation industry is governed by the following Milspecs:

  • MIL-STD-276A is the design criteria standard for the impregnation of metal castings and powdered metal components.
  • MIL-I-17563C is the specification that covers specifically the testing of the sealant used in MIL-STD-276A.
  • QPL-17563 is the Qualified Product List (QPL) and identifies sealants that have met all requirements for qualification to MIL-I-17563C. Godfrey & Wing sealants 95-1000A, 95-1000AA, 95-1000AC and 95-1000ACP are listed on the QPL.

Once approved on the QPL and in accordance with DoD (Department of Defense) 4120.24-M, Defense Standardization Program (DSP) Policies and Procedures, paragraph AP2.7.9, every two years each manufacturer who has a product(s) listed on the QPL is required to submit a QPL Recertification Form to the Qualifying Activity (QA).  This form certifies that products are still being manufactured under the same conditions as originally qualified and continue to meet the requirements of the current specification.  Failure to provide the certification form is cause for removal of the company’s product(s) from the QPL.

In future articles, I will discuss some of the specifics as it relates to the qualification of sealants as per MIL-I-17563C and a definition of classifications.

For more information about Godfrey & Wing sealants, please click here.

Topics: Impregnation Sealants, milspec, military standard, Sealants

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