This method is intended for use in determining he resistance of cloth to flame and glow propagation and tendency to char. It is designed primarily for cellulosic fabrics treated with a flame retardant, but my be utilized in other applications as specified in applicable procurement documents.

National Fire Protection Association

This 1969 edition supersedes the 1968 edition of the Standard and differs from that edition due to the following amendments which were developed by the National Fire Protection Association Annual Meeting on May 15, 1969. Entire Section 50 was revised and new test, entitled "Field Test", was added to the Appendix.

W.S. Perkowski, Dr. R.G. Cheatham

The aircraft industry, like the building industry, and industries which manufacture such items as household appliances, office equipment, marine pleasure crafts and automotive products is interested in the safety of the people using their products. There is an ever increasing emphasis on the use of plastic materials in all these fields and one common major safety considerations is the flammability properties of these materials. The test methods used to best determine the fire safety provided by plastic materials creates quite a problem for the Materials Engineer. It is likewise a tremendous task for those agencies charged with establishing and enforcing the fire safety requirements and regulations for these materials used in each of the many industries. In the aircraft manufacturing industry plastic materials are used for a large variety of items in the fabrication and assembly of a large variety of items in the fabrication and assembly of an airplane. They are used for structural purposes, in mechanical and electrical subsystems, electrical terminal boards and wire coatings, air ducting, water tanks and tubing, seals and sealants. The most widespread use, however, is for the interior sidewall and ceiling linings, and the many other furnishing of the areas used for cargo storage. The flammability properties of the materials used for these purposes and the fire safety provided by such properties are of the greatest concern.

E. Nichols

A recent request form the program manager ARD-520 to initiate a test program to conduct flammability and smoke density test on a material has been completed.

C.E. Leyes

Foamed plastics, sometimes called expanded, cellular or sponge plastics are a group of low density, high quality materials which can be engineered to meet specific end requirements of density, cell size, etc.