06
Hydrogen embrittlement resistant metals and metal alloys;
steel and metal pipes and tubing, including their parts and
fittings thereof, such as couplings, elbows, sleeves, end
caps, and flanges; metal pipe and tube joints; metal pipe
collars; metal junctions for pipes; seamless metal line
pipes; welded metal line pipe; metal mother pipes; metal
pipes for the petrochemical industry; boiler metal pipes;
metal pipe and tube exchanger pipes; metal drilling pipes;
steel and metal pipes, and metal vessels for the transport
and storage of oil and fuel and hydrogen fuel; metal tubes
used in auto parts and safety devices; containers of metal
for storage, transport and packaging; metal storage tanks;
metal tubular vessels; containers of metal; tanks of metal
for transporting liquids; metal storage vessels; conduits of
metal [except electrical and electronic conduits]; all of
the foregoing manufactured with hydrogen embrittlement
resistant metals and metal alloys; metal cylinders for
compressed gas or liquids
37
Application of coatings [paints] on pipes; application of
surface coatings [painting] for surfaces of metal alloys and
application of surface coatings [paints] for metal alloy
pipes for others
40
Custom manufacture of cylinders for storing and transporting
high pressure gases; metal coating [not painting]; treatment
and coating of metal surfaces; metal alloy coating services
for others; application of wear resistant coating on metals;
heat treatment and coating of steel; application of surface
coatings for metal alloy for others
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