NF E29-480:1994 Preinsulated bonded pipe systems for underground hot water networks. Steelvalve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene.
1994NF E29-480:1994 Preinsulated bonded pipe systems for underground hot water networks. Steelvalve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene.