Valve and pipeline have kind of how many kinds of join

It is between whole valve and pipeline or equipment how connective, this problem cannot be ignored, because of valve run, risk, phenomenon of drop, leakage, majority happening is here. 1 flange joins flange join is the join form that uses at most between valve and pipeline or equipment. It is to point to reach bolt by flange, spacer 3 person the detachable join that mutual join regards a group of combination as sealed structure. Conduit flange fastens the flange that the tubing in pointing to pipeline unit uses, use on equipment to fasten the flange of imports and exports that points to equipment. Flange join is used convenient, can bear greater pressure. Flange joins applicably the valve at pressure of all sorts of nominal dimension, nominal, but certain to using temperature to have limitation, when high temperature operating mode, because the join bolt of flange is easy,cause leak, usually flange join is recommended in ≤ 350 ℃ temperature is used. By union face figure can divide again it is the following kinds: Smooth style: Use at pressure not tall valve. Treatment compares convenient and concave and convex style: Actuating pressure is higher, in can using type of chamfer of hard gasket tenon: Usable plasticity is out of shape bigger gasket, use in caustic medium more extensive, sealed effect is better echelon chamfer type: Make washerbed down the livestock with elliptic ferrule, use at square of 60kg/ of actuating pressure ≥ centimeter valve or type of lens of high temperature valve: Washerbed down the livestock is lenticular appearance, make with the metal. Use 100 kilograms at actuating pressure ≥ / square centimeter high-pressured valve or type of circle of form of O of high temperature valve: Newer flange join form, sealed effect places join 2 pairs to use bolt to wear valve and bicephalous conduit the join form that places together directly reliably than making the same score washerbed down the livestock commonly. 3 solder receive solder one after another one after another is to show body of valve a powerful person is contained solder groove, the form of a kind of join that through soldering means and pipeline system are linked together. GB/T 12224, API600, ASME B 16.

34 wait for a standard to soldering groove made a provision. The solder of valve and conduit receives cent to be pair of solder to join one after another (BW) with bear the join that insert solder (SW) , bear the regulation that the Duan Yingfu that insert solder adds up to JB/T 1751. Join to solder (BW) applicably the operating mode at all sorts of all sorts of dimension, pressure and high temperature, bear the join that insert solder (SW) the valve that applies to ≤ DN50 commonly. 4 threaded coupling this is a kind of simple join method, commonly used at small valve. Divide kind of case again: Direct and sealed: Whorl of inside and outside has sealed effect directly. To ensure joint does not leak, often use Ma Heju of plumbic oil, line raw material of 4 fluorine ethylene takes stuff, get together among them 4 fluorine ethylene lays makings ribbon, application is wide. Corrosion resistance of this kind of material can be very good, sealed effect is admirable, use and save convenient, when disassembling, get off its thoroughly, because it is one does not have agglutinant film, hemp of oilier than lead, line is gotten primely much. Indirect and sealed: Whorl comes back close force, deliver the gasket that sees to two plane, let washerbed down the livestock have sealed effect. 5 chuck join chuck joins working principle is, should come back when close nut, chuck gets pressure, make its blade ministry bites the wall outside pipe, the cone outside chuck falls to join closely with face of contact body inner cone in pressure again, can prevent leak reliably consequently. The advantage of form of this kind of join is: 1) volume is minor, weight is light, the structure is simple, tear open outfit is easy; 2) join force is powerful, scope of application is wide, can be able to bear or endure high pressure (1000 kilograms / square centimeter) , high temperature (650 ℃ ) with concussion vibration; 3) can choose a variety of material, suit anticorrosion; 4) treatment precision demand is not high; 5) facilitating headroom installation. Current, chuck join form, already was in our country use in product of certain small-bore valve. 6 calories of band join this is method of a kind of fast join, it needs two bolt only, apply to the low-pressure valve that often disassembles. 7 inside link is being tightened oneself inside close connection oneself is a kind of join form that uses medium pressure to undertake be tighteninged oneself. Its sealing ring outfit is in part of inner cone body, with medium photograph to become proper point of view at the same time, medium pressure sends inner cone form, deliver sealing ring again, on the cone of proper point of view, produce two component, as outward as parallel of line of center of body of a powerful person, another is pressed to wall of body of a powerful person. This component of force is to tighten force oneself from the back. Medium pressure heals big, also heal from close force big. So this is planted join form, agree with high-pressured valve. It compares flange connection, want to save a lot of material and labor power, but it is certain to also need tighten force beforehand, so that be when power of internal pressure of a powerful person is not high, use reliable. Use the valve that seals principle make it cheek by jowl oneself, it is high-pressured valve commonly. Valve connective form is very much still, for example the small valve that some need not demolish, solder together with pipe; Some metalloid valve, use bear the join that insert type, etc. The person that valve is used should rest according to providing the case is particular treat. 8 other and other valve join forms are very much still, for example the small valve that some need not demolish, solder together with pipe; Some metalloid valve, use bear the join that insert type, etc. The person that valve is used should rest according to providing the case is particular treat. CNC Milling