They are hot rolled or cold drawn heat treated, welded
or seamless tubes usable for build boilers and heat
exchangers and subject to high pressures.
Depending on the type of the steel, they can be used at high
and low temperatures. They are part of the typology of steels
covered by the European guideline PED and produced
according to the UNI EN 10216 and UNI EN 10217 standards.
Normally, the steels are in carbon for low temperatures
or chromium molybdenum alloy for higher temperatures.