This Standard establishes the requirements for order, manufacturing and supplying conduits hard carbon steel with screw ABNT NBR 8133, manufactured pipes with longitudinal welding, with protective coating, which are intended to protect the electrical conductors.
ABNT NBR 5624-2011 history
2011ABNT NBR 5624-2011 Conduit hard carbon steel, welded, coated thread protector and ABNT NBR 8133 - Requirements