Stainless steel has a unique corrosion resistance, it can react with oxidants, forming a thin layer of dense oxide film, to prevent further occurrence of oxidation reaction. For other types of metal pipe, there are almost no passivation functions, one of which is the main reason of stainless steel pipe fittings material corrosion resistance than ordinary metal pipe.

锈钢管件被公认为健康的材料，广泛运用于食品加工输送管道中，包括制药工业、饮料、酿造等。不锈钢管件材料性能优越，有效地降低输送成本，在长期的输送的过程中不会结垢，内壁光洁，同时输送能耗低，是目前为止输送成本最低的水管材料。

Stainless steel pipe fittings were recognized as health materials, widely used in food processing pipeline, including the pharmaceutical industry, brewing, beverage. Stainless steel pipe material with excellent performance, effectively reduce the transportation cost, scale, no node in the long-term transportation process smooth inner wall, and delivery of low energy consumption, is by far the lowest cost of transporting pipe material.

一、不锈钢管件分类及用途

A stainless steel pipe fittings, classification and Application

1、不锈钢管件分类

1, stainless steel pipe fittings classification

不锈钢管件属于管件的一种，它是由不锈钢的材质制成所以叫不锈钢管件，它包含：不锈钢弯头，不锈钢三通，不锈钢四通，不锈钢异径管，不锈钢管帽等，

A stainless steel pipe belongs to a pipe, which is made of stainless steel so called stainless steel pipe fittings, it includes: stainless steel elbow, stainless steel three, stainless steel four, stainless steel of different diameter pipe, stainless steel pipe cap,

根据联接方法可分为承插式不锈钢管件、螺纹不锈钢管件、法兰不锈钢管件和焊接不锈钢管件四类。不锈钢弯头用于管件转弯的地方;法兰用于使管子与管子相互连接的零件，连接于管端，不锈钢三通管用于三根管子汇集的地方;不锈钢四通管用于四根管子汇集的地方;不锈钢异径管用于不同管径的两根管子相联接的地方。

According to the connection method can be respectively inserted type stainless steel pipe fittings, stainless steel pipe, stainless steel pipe fittings threaded flange and welding of stainless steel pipe four categories for bearing. Stainless steel elbow pipe fitting for a corner; flange for the pipe and pipe interconnected parts, connected Yu Guanduan, stainless steel three way pipe for three tubes together place; stainless steel four way pipe for four tubes together place; for two different pipe diameters connected place of stainless steel pipes of different diameter.

2、不锈钢管件的用途

2, the use of stainless steel pipe fittings

不锈钢管件可以利用油漆或耐氧化的金属(例如，锌，镍和铬)进行电镀来保证碳钢表面，但是，正如人们所知道的那样，这种保护仅是一种薄膜。如果保护层被破坏，下面的钢便开始锈蚀、耐空气、蒸汽、水等弱腐蚀介质和酸、碱、盐等化学浸蚀性介质腐蚀的钢。

Stainless steel pipe fittings can use paint or oxidation resistant metal (for example, zinc, nickel and chromium) plating to ensure the carbon steel surface, but, as everyone knows, this protection is only a thin film. If the layer is destroyed, the following steel began to rust, the resistance of air, steam, water and other corrosive medium and weak acid, alkali, salt and other chemical etching medium corrosion of steel.

不锈钢管件用的最多的地方就是压力容器方面和化工方面。一般的炼油设备厂都有大量需求。其他方面，比如化工、食品、饮料、制药等行业都能应用。其主要广泛用于石油、化工、医疗、食品、轻工、机械仪表等工业输送管道以及机械结构部件等。

The largest is the place where the pressure vessel and chemical aspects of stainless steel pipe fittings for. Oil refining equipment factory in general have a large demand. Other aspects, such as chemical industry, food, beverage, pharmaceutical and other industries can be applied. The main are widely used in petroleum, chemical, medical, food, light industry, mechanical instruments and other industrial pipes and machinery structure parts.

二、不锈钢管件的特点

Characteristics of two, stainless steel pipe fittings

1、寿命

1, life

不锈钢管材具有最长的使用寿命。从国外的不锈钢使用状况分析，不锈钢水管的使用寿命可达100年，至少也有70年，与建筑物的寿命一样长。

Stainless steel pipe has the longest service life. From abroad situation analysis of stainless steel pipe stainless steel use, the service life of up to 100 years, at least 70 years, and as long as the life of the building.

2、耐腐蚀性能

2, corrosion resistance

不锈钢管材最突出的优势之一是其优异的耐腐蚀性能，在各种管材中是最佳的。因为不锈钢可以与氧化剂发生钝化作用，在表面形成一层坚韧致密的富铬氧化物保护膜Dr2O3，有效阻止氧化反应的进一步发生。而其他金属管材，如镀锌水管、铜管钝化能力很小，这就是镀锌管的铜管耐腐蚀性能远远不及不锈钢管材的关键原因。

One of the most prominent advantages of stainless steel pipes is its excellent corrosion resistance, in a variety of pipe is the best. Because stainless steel passivation effects can occur with the oxidant, forming a layer of tough dense chromium oxide protective film on the surface of Dr2O3, further effectively prevent the oxidation reaction. And other metal pipes, galvanized pipes, such as copper passivation ability is very small, this is galvanized pipe copper pipe corrosion resistance is far less than the key reason of stainless steel pipe.

不锈钢不会像碳钢那样发生均匀腐蚀，使用时无需保护涂层;采用不锈钢水管，对水的化学成分没有限制，因为不锈钢在各种氧含量、温度、PH和硬度的水中均有很好的耐蚀性;不锈钢水管能够经受很高的流速，即使流速大于40米/秒，仍然保持极低的腐蚀速率，不超过0.003毫米/年，特别适合高楼供水。

Stainless steel does not happen like that uniform corrosion of carbon steel, without the need for protective coating use; using stainless steel pipe, chemical composition of the water has no limit, because the corrosion resistance of stainless steels is very good in both PH and hardness of various oxygen content, temperature, water; stainless steel pipe can withstand very high velocity, even greater than the velocity of 40 m / second, remained very low corrosion rate, less than 0.003 mm / year, especially suitable for supplying water for high building.

3、耐热与保温

3, heat resistance and insulation

不锈钢管的热导率是铜管的1/25，是普通钢管的1/4，特别适合热水输送。 水工业最常使用的不锈钢是304和316不锈钢，它们能够满足绝大多数水处理和输关条件。

The thermal conductivity of the stainless steel tube is a copper tube rate 1/25, is a common steel pipe 1/4, especially suitable for hot water. Water industry the most commonly used stainless steel is 304 and 316 stainless steel, which can meet the vast majority of water treatment and transportation conditions.

4、强度

4, strength

材料的强度决定了水管是否坚固耐撞，安全可靠。而安全可靠是建筑给水中最重要的要求。在受到外力撞击的情况下，不锈钢水管漏水的可能性极小. 高楼供水系统工作压力一般大于0.6Mpa;对管材承压要求较高。薄壁不锈钢管由于优良的机械性能，能够承受很高的供水压力，可达10Mpa以上，特别适合高楼供水。

The strength of the material determines the water pipes are strong collision resistance, safe and reliable. Safety and reliability is the most important requirement in building water supply. Under the external force impact, little possibility of stainless steel pipe Water Leakage. Water supply system working pressure of tall buildings is generally greater than 0.6Mpa; the higher demands on the pipe pressure. Thin wall stainless steel pipe with excellent mechanical properties, can withstand high water pressure, up to 10Mpa or more, especially suitable for supplying water for high building.

三、如何辨别真假不锈钢管件

Three, how to distinguish true and false of stainless steel pipe fittings

1、比较项目牙锋及牙距：

1, compare the teeth and teeth from the front project:

2、标准肉眼看牙锋锋利、牙距均匀且光亮。

2, the standard eye teeth, tooth spacing uniform front sharp and bright.

3、手感：牙锋顺滑、加工深度规范，芯正壁匀，流件畅通。

3, handle: tooth front sliding, the depth of processing standard, core wall is uniform, smooth flow of parts.

4、出厂前经过机械处理，表面无夹、杂物。

4, the factory by mechanical processing, clip, debris without surface.

5、含碳量低、耐腐、耐氧化、韧性强，抗压力强。

5, low carbon content, corrosion resistance, oxidation resistance, strong toughness, anti pressure ability.

6、粗造，牙锋不利且厚，牙距不规范，牙锋时有损害，易漏水

6, rough, teeth front teeth distance disadvantage and thick, not standardized, teeth when the front there is damage, easy to Water Leakage

7、螺纹看不到光泽，灰暗手感差，

7, the thread can not see dark gloss, feel bad,

8、芯歪，壁厚薄不匀，流体过后易堵。

8, the core wall of crooked, uneven thickness, fluid after blockage.

9、粗造，表面未处理，易被氧化

9, rough, no surface treatment, easy to be oxidized

10、含碳量高，不耐腐、韧性差、抗拉力弱。

10, high carbon content, not resistant to rot, poor toughness, anti tensile strength weak.

四、不锈钢管件的安装技巧

Installation techniques four, stainless steel pipe

不锈钢管件的安装技巧主要有以下9个注意事项：

Installation technique of stainless steel tubes are mainly in the following 9 matters needing attention:

1、不锈钢材料吊运，不能与其他金属直接接触，应加垫木板或橡胶板等非金属材料。

1, stainless steel material lifting, can not be in direct contact with other metals, padded wooden or rubber plate and other non-metallic materials.

2、管子切割不允许用普通砂轮片切割，应采用不锈钢专用砂轮片或等离子切割。

2, pipe cutting is not allowed to cut with ordinary grinding wheel piece, should use special stainless steel grinding wheel or plasma cutting.

3、不锈钢管材及管件定位焊时焊缝内侧应进行充氩保护。

3, stainless steel pipe welding seam should be positioning inside argon protection.

4、起弧与收弧、起弧采用回焊法 , 收弧应填满弧坑 . 起弧必须在坡口内完成 ,禁止在管道、管件母材表面打弧与起弧。若

4, the arc and arc, arc back arc welding method used, should fill the crater. The arc must be completed in the groove, the prohibition of arcing in the pipeline