NAPCA BULLETIN 1-65-94 Recommended Specification Designations for Coal Tar Enamel Coatings Specification Symbol These are recommended enamel coating system designations except for specialty requirements. * Part #1 **Part #2 Abr asiv e Bla st Pri mer 93.75 Mils Min Enamel Fiberglas s Innerwra p Felt Wrap per Seal Coat Oute rwra p Kraft Paper Electric al Inspecti on TF -- X X X X X X TG -- X X X X X X TGF -- X X X X X X X TGO-- X X X X X X X TGSF-- X X X X X X X X * Part #1 Symbol — ** Part #2 Symbols Enamel & Wrappers Grades of Enamel T — Coal Tar 3 — Fully-Plasticized Coat Tar G — Fiberglass Innerwrap (Ordered by penetration which is dictated by F — Coated Glass Felt or Mineral Felt ambient temperature) O — Fiberglass Outerwrap 4 — High temperature service coal tar S — Seal Coat Example: Full-plasticized coal tar enamel wrapped with fiberglass, felt, and kraft - the symbol would be TGF - 3.
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NAPCA BULLETIN 1-65-94
Recommended Specification Designations for Coal Tar Enamel Coatings Specification Symbol
These are recommended enamel coating system designations except for specialty requirements.
* Part #1 **Part #2
Abrasive Blast
Primer
93.75 Mils Min
Enamel
Fiberglass Innerwrap
Felt Wrapper
Seal Coat
Outerwrap
Kraft Paper
Electrical Inspection
TF --
X
X
X
X
X
X
TG --
X
X
X
X
X
X
TGF --
X
X
X
X
X
X
X
TGO--
X
X
X
X
X
X
X
TGSF--
X
X
X
X
X
X
X
X
* Part #1 Symbol ** Part #2 Symbols Enamel & Wrappers Grades of Enamel T Coal Tar 3 Fully-Plasticized Coat Tar G Fiberglass Innerwrap (Ordered by penetration which is dictated by F Coated Glass Felt or Mineral Felt ambient temperature) O Fiberglass Outerwrap 4 High temperature service coal tar S Seal Coat Example: Full-plasticized coal tar enamel wrapped with fiberglass, felt, and kraft - the symbol would be TGF - 3.
Text1: DISCLAIMER: These specifications may be used in whole or in part by anyone without prejudice, if recognition of the source is included. The National Association of Pipe Coating Applicators (NAPCA) assumes no responsibility for the interpretation or use of these specifications. The intended use of the coatings identified herein is to provide corrosion protection for buried pipelines. Above ground storage of coated pipe in excess of six months without additional Ultraviolet protections is not recommended.