For the treatment of steel pipe anticorrosion recharge is still used in the material is hot shrinkage casing, but there are many customers in the purchase process for the shrinkage of the heat shrinkable casing, that is, the width of the refill is not more familiar with the above situation. Small series according to industry standards SY/T0413-2002 and national standards GB/T23257-2009 in the relevant requirements, for you to talk about the heat shrinkage casing in the process of use how to determine the width of the refill.

For the calculation of the filling width of the heat shrinkable casing, four aspects need to be considered, namely, the length of the steel pipe reservation, the width of the polyethylene layer, the longitudinal shrinkage of the filling material, and the economic consideration. The first two of these four factors are the main factors, the third factor is low technical factors of heat shrinkable tube, the economic factors are more complex, on the site to play a detailed introduction. The above four factors will determine the filling heat shrinkage casing and the width of the refill heat shrinkable casing.

1, the reserved length of steel pipe

Steel pipe in the process of processing to do anti-corrosion treatment, will leave a certain length in the two ends of the steel pipe, used for filling the mouth. There is no clear provision for how long the filling of steel tubes remains. In the actual use of the middle of the process there is no practical provisions, and the diameter of the steel pipe on the length of the reserved segment also has a certain impact, usually reserved length will not exceed 150mm, this data as a reference is more common.

2, polyethylene layer splicing width

In the process of filling construction, heat shrinkable casing and polyethylene anticorrosion layer need to maintain the value of double wall heat shrinkage tube, at present in the national standard and industry values are relatively standard, will not be less than 100mm, usually with such a value for reference is more common.

3, the longitudinal shrinkage of the filling material

Thermal shrinkage casing in the construction process, where the width and the width of the finished product at the factory will be a certain difference, for such a ratio we call longitudinal shrinkage. These values and the actual construction of the product, steel pipe caliber, construction are a certain relationship, is more complex, the general requirements will not be greater than 5%. Therefore, the smaller caliber, generally will not exceed the anticorrosion complement of the steel pipe, for the comparison of high-quality products, will not consider this factor, if the filling is relatively large can consider increasing the width of the material.

Heat shrinkable casing filling wide high temperature heat shrinkage pipe degree, the most commonly used is 500mm, for small-caliber steel pipe, can be reduced use, this is because the steel pipe reservation section is usually relatively small. In the process of purchasing, it is necessary to take into account the needs of practical engineering, so it is reasonable to determine the width of the heat shrinkable casing.

Heat Shrinkable Pipe

It has the functions of cladding, stress lifting, insulation, anti-corrosion, electric resistance, wear resistance and so on.

Solder Ring

The preset solder ring provides a controllable welding process with low melting point and good weldability.

Easy to install, easy and fast operation, low cost.

Pre-placed by the connection, heating, heat shrinkable tube shrinkage, rubber ring softening, solder melting at the same time, as well as optional pre-assembled ground line, easy and fast operation, eliminating the traditional welding, protection process.

选择热缩套管的补口宽度了解热缩屏蔽焊锡环的特点

对于钢管防腐补口的处理仍然使用的材料是热缩套管，但是有很多的客户在购买的过程中对于热缩套管的收缩宽度，也就是补口宽度不是比较熟悉，对于上述这样的情况。小编根据行业标准SY/T0413-2002以及国家标准GB/T23257-2009中相关要求，为大家讲讲热缩套管在使用的过程中怎样来确定补口的宽度。

对于热缩套管的补口宽度的计算，需要进行四个方面的考虑，分别是钢管预留的长度、聚乙烯层搭接宽度，补口材料纵向收缩率、经济考虑。在这四个因素中前两种是主要的因素，第三个因素低技术上的因素热缩管，经济上的因素比较复杂，就部位打大家详细介绍。以上四种因素将会决定补口热缩套管以及补口热缩套管的宽度。

1、钢管的预留长度

钢管在加工的过程中做了防腐处理，都会在钢管的两头留下一定的长度，用来进行补口。对于钢管的补口留多长没有什么明确的规定。在实际使用的过程中叶没有什么实际的规定，而且钢管的口径对预留段的长度也是有一定影响的，通常预留的长度不会超过150mm，以此数据作为参考是比较普遍的。

2、聚乙烯层搭接宽度

在补口施工的过程中，热缩套管与聚乙烯防腐层需要保持双壁热缩管定的数值，目前在国标与行业中的数值都是比较标准的，不会小于100mm，通常以这样的数值来进行参考是比较普遍的。

3、补口材料纵向收缩率

热缩套管在施工的过程中，其中宽度与出厂时成品的宽度会有一定的区别，对于这样的比值我们称为纵向收缩率。这些数值与实际的施工的产品、钢管口径、施工都是由一定关系的，是比较复杂的，一般的要求不会大于5%。所以较小的口径，一般不会超过钢管的防腐补口，对于比较优质的产品，是不会考虑这一因素的，如果补口比较大可以考虑增加材料的宽度。

热缩套管的补口宽高温热缩管度，最常用的是500mm，对于小口径的钢管，可以减小使用，这是因为钢管的预留段通常比较小。在采购的过程中需要考虑到实际工程的需要，这样确定热缩套管的宽度就比较合理。

▼热缩管

具有包覆、应力解除、绝缘、防腐蚀、耐电、耐磨等作用。

▼焊锡环

预置焊锡环提供可控制的焊接过程，熔点低，焊接性好。

▼易安装，操作方便快捷，成本低。

预置于被连接处，加热，热缩管收缩，胶环软化，焊锡熔化同时进行，以及可选择的预装引出地线，操作方便快捷，省去了传统的焊接、防护过程。