FLAMEPROOF EQUIPMENT- CONSTRUCTIONAL REQUIREMENTS
USE OF APPROVED MATERIAL WITHOUT THE USE OF INCENDIVE FRICTIONAL SPARKING
EQUIPMENT SHOULD WITHSTAND ROUGH USAGE
EQUIPMENT SHALL BE ADEQUATELY STRONG TO WITHSTAND ALL REQUIRED TESTS
THE EFFECTIVE THREADED METAL TO METAL JOINTS SHALL HAVE A MINIMUM OF 5 FULL UNINTERRUPTED ENGAGED THREADS & A MINIMUM EFFECTIVE UNINTERRUPTED DIRECT AXIAL LENGTH OF THREADED ENGAGEMENT OF 9 mm
THERE SHALL BE NO INTENTIONAL GAP BETWEEN JOINT SURFACES
NO PACKING MATERIAL SHALL BE USED BETWEEN OPPOSED SURFACES TO FORM A FLAMEPROOF JOINT
IF COMPRESSIBLE PACKING MATERIAL OR A GASKET IS NECESSARY TO SEAL A JOINT (eg. IP) THE PACKING SHALL BE APPLIED AS A SUPPLMENT TO, BUT SHALL NOT BE INCLUDED IN THE FLAMEPROOF JOINT
ANY DISPLACEMENT, DAMAGE, INTEGRATION OR OMISSION OF THE PACKING SHALL NOT RESULT IN THE FLAMPROOF NATURE OF THE JOINT BEING ADVERSELY