GOST 6991-1986
Coals of pechora basin. Classification

Standard No.

GOST 6991-1986

Release Date

1986

Published By

RU-GOST R

Status

Be replaced 1991-01

Replace By

GOST 25543-1988

Latest

GOST 25543-2013

Replace

GOST 6991-1974

GOST 6991-1986 history

• 2013 GOST 25543-2013 Brown coals, hard coals and anthracites. Classification according to genetic and technological parameters
• 1988 GOST 25543-1988 Brown coals, hard coals and anthracites. Classification according to genetic and technological parameters
• 1986 GOST 6991-1986 Coals of pechora basin. Classification
• 0000 GOST 6991-1974

GOST 6991-1986 Coals of pechora basin. Classification was changed to GOST 25543-1988 Brown coals, hard coals and anthracites. Classification according to genetic and technological parameters.