Copper Pipe and Brazing Wire Requirement for Water Piping and Refrigerant

This article is about Copper Pipe and Brazing Wire Requirement for Water Piping and Refrigerant in commercial buildings, plants and refinery projects related to Plumbing Engineering System as per international codes and standards.

There are following technical requirements

Copper Tubing for water piping and refrigerant shall be Type “”K”” or “”L”” plain ends (Line Class 12BC0U) in accordance with ASTM B88 specifications or 90/10 Cu-Ni *(Line Class12 BD0U) in accordance with UNS-C70610 to BS 2871, Part 2 and EEMUA Publication No. 144, Section 1 specifications.
For application where higher strength or increased erosion resistance is required, alternative copper alloy material (70/30 Copper Nickel or approved equal) may be used. “
Copper drainage tube (DWV) for Sanitary Drainage, Waste and Vent shall be in accordance with ASTM B-306-02 (UPC table 14)
All hard drawn copper tubing shall be marked by means of a continuous and indelibly coloured stripe at least one quarter (¼) inch (6.4 mm) in width, as follows: Type K, green; Type L, blue; Type M, red; Type DWV, yellow. (UPC Para 604.3)
Fitting shall be in accordance with ASME B 16.22 for solder or brazed joint.
Brazing wire for different services shall be as shown in Table below: