紫銅、黃銅管道安裝技術(shù)交底-北京建工集團(tuán).doc

    1  范圍：
本工藝標(biāo)準(zhǔn)適用于工作壓力為4MPa以下、溫度為250～-196℃的紫銅管道和工作壓力為22MPa以下、溫度為120～-158℃的黃銅管道的安裝工程。
    2 施工準(zhǔn)備。
    2.1  常用材料：
    2.1.1  管材：常用的有紫銅管（工業(yè)純銅）及黃銅管（銅鋅合金）按制造方法的不同分為拉制管、軋制管和擠制管，一般中、低壓管道采用拉制管。紫銅管常用材料的牌號(hào)為：  T2、T3、T4、TUP（脫氧銅）；分為軟質(zhì)和硬質(zhì)兩種。黃銅管常用的材料牌號(hào)為：H62、H68、H85、HP659-1，分為軟質(zhì)、半硬質(zhì)和硬質(zhì)三種。
    2.1.2  銅合金。為了改善黃銅的性能，在合金中添加錫、錳。鉛、鋅、磷等元素就成為特殊黃銅。添加元素的作用簡述如下：
    2.1.2.1  加錫能提高黃銅的強(qiáng)度，并能顯著提高其對(duì)海水的耐蝕性能，故錫黃銅又稱"海軍黃銅"；
    2.1.2.2  加錳能顯著提高合金工藝性能、強(qiáng)度和耐腐蝕性
1 range:
This technology is applicable to the work pressure 4MPa below the temperature of the copper 250 ~ -196 ℃ and working pressure of 22MPa Road, below the temperature 120 ~ -158 ℃ brass pipe installation.
    2 construction preparation.
    2.1 Common Materials:
    2.1.1 Tube: commonly used are copper (industrial copper) and yellow brass (copper and zinc alloy) according to the different manufacturing methods drawn into pipes, rolling tube and extruded, the normal, the low-pressure pipe with drawn tubes. Copper grade is commonly used materials: T2, T3, T4, TUP (deoxidized copper); divided into two kinds of soft and hard. Brass material commonly used grades as: H62, H68, H85, HP659-1, is divided into soft, semi-hard and hard of three.
    2.1.2 Copper Alloy. In order to improve the performance of brass, tin added in the alloy and manganese. Lead, zinc, phosphorus and other elements on a special brass. The role of added elements are summarized below:
    2.1.2.1 plus tin can increase the strength of brass, and can significantly improve the corrosion resistance in seawater, so tin brass, also known as "naval brass";
    2.1.2.2 plus manganese alloy can significantly improve performance, strength and corrosion resistance
 

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