This document specifies the product structure, requirements, test methods, inspection rules, as well as marking, transport and storage of prefabricated directly buried insulating pipes (hereinafter referred to as insulating pipes) and fittings, comprising outing casing pipes of high density polyethylene(hereinafter referred to as casing pipes), rigid polyurethane foam plastic insulation layers (hereinafter referred to as insulation layers), steel service pipes or steel fittings.
This document is applicable to prefabricated directly buried insulating pipes and fittings, for continuous operation at various temperatures up to 120 ℃ and occasionally with a peak temperature up to 130 ℃.
定价: 972元 / 折扣价: 827 元 加购物车
This standard specifies the terms and definitions,symbols,technical characteristics,requirements,test methods,inspection rules as well marking,packaging,transport and storage of heat meters.
This standard is applicable to the manufacture and inspection of heat meters using water as the medium. When the medium is other kinds of liquid,this standard can be implemented after obtaining the specific enthalpy and density parameters of the liquid.
定价: 1812元 / 折扣价: 1541 元 加购物车
This document specifies the construction, classification and code,marking, general, requirements, test methods, inspection regulations, sign, transport and storage of pre-insulated composite plastic pipes with polyethylene(PE)casing.
This document is applicable to pre-insulated composite plastic pipes with polyethylene(PE) casing used in heating and cooling system.
定价: 1164元 / 折扣价: 990 元 加购物车