Service pipes

The basic design typically utilizes steel pipes corresponding to the following standards:

• ČSN 425710 threaded steel pipes, common
• ČSN 425715 seamless hot-rolled
• ČSN 426714, DIN 2393 welded with increased precision
• ČSN 426710 seamless precision cold-formed

Basic dimensions of heat distribution piping systems used:

Surface quality requirements:

Before it is filled with foam, the pipe surface must be cleaned so that it is free of impurities such as rust, grease, dust, paint, moisture, and other contaminants. Before cleaning, the surface of the pipe shall conform to corrosion grades A, B, or C according to ISO 8501-1, and deep-set localized corrosion must not be present.

Furthermore, pipes made of other materials can be used as service pipes depending on the purpose and requirements:

• condensate - anticorro, steel pipe, epoxy-fibreglass, polypropylene, ...
• heating water - polyethylene, polypropylene, epoxy glass laminate, copper
• hot supply water - epoxy glass laminate, polypropylene type 3

Type of pipe	Material quality	Dimensional standard
Anti-corrosion steel (AK)	ČSN 17248.4  ČSN 17240	ČSN 426750.01
Hot dip galvanized pipe	ČSN 425710 ČSN 11343 DIN 2444	ČSN 420142.12 DIN 2440
Polypropylene pipe	ČSN 643060 DIN 8078	ČSN 643060 DIN 8077
Copper pipe  Unoxidized copper	DIN 1787	DIN 1786