Pipe Unions - Hebei Haihao Group

Pipe Unions

What is a pipe unions?

A pipe union is used to connect two pipes and the connection is a secure and semi-permanent.It is consisted of two pipes connected together via a third piece,and all the three parts are threaded.The pipe unions are similar to threaded couplings,they are usually easier to remove and allow pipes of different metals to be securely connected together.This connection method is common in home and business plumbing systems.

At first glance,a pipe coupling and a pipe union seem very similar.Both use a male and female threading system to connect the two pipes together.The main difference between the systems comes from the actual method of joining.Two connected pipes are screwed together directly,one inside the other.To take the pipes apart,each pipe connected to the coupling pipe needs to be rotated.In a complete piping system,this means the entire system needs to come apart to remove one pipe.

ASTM A105 ANSI B16.11 pipe union

ASTM A105 ANSI B16.11 pipe union

With a pipe union,the two ends of the pipe are not screwed together,but are screwed into a third piece.When one pipe needs to come apart from the other, the union piece simply screws onto one of the two pipes completely. If both ends of a pipe are attached using a union, the pipe may be removed on its own without unscrewing the other pipes in the system.

Pipe union is a type of fitting equipment designed in such a way to unite two pipes which can be separated without causing any deformation to the pipes.Any kind of small diameter pipe connection needs to be positive sealed and easy to install and remove with the help of pipe union.

Any kind of small diameter piping connections requiring a positive seal and easy assembly as well as disassembly are made with the help of pipe union.In other words, the pipe unions can easily take two pipes apart. They are widely demanded in the pipe fitting market.

Three parts of pipe union:

  • A nut
  • A female end
  • A male end

With the joining of the female and male ends,the nuts are used to provide the necessary pressure to seal the joint.The parts of the pipe union are normally locked together by at least one radial screw or nut with sized cross section. When severe pulling stress is applied onto the pipe union from the outside,the locking screw breaks and removes the two parts of the union,which in turn separates together with the pipes to which they are attached.Under normal conditions elastically stressed sealing objects ensure maintenance of water tightness between the union parts.

Specifications of pipe unions:

Size: 1/8″-3″ class 3000 and 1/8″-2 1/2″ class 6000

Thickness: SCH 10,SCH 40,SCH 80,SCH 160,XS,XXS

Standards for pipe unions:

ASME B16.11-2016 Standard Specification for Forged Fittings,Socket Welding and Threaded

MSS SP83-2018 Standard Specification for Class 3000 And 6000 Pipe Unions,Socket Welding and Threaded

Materials for pipe unions:

Haihao Group manufacture & supply pipe unions with different materials such as carbon steel,stainless steel,alloy steel.

Carbon steel: ASTM A105,A350 LF2,etc.

Stainless steel: ASTM A182 F304,F304L,F316,F316L,F321,F347,F310,F44,F51,etc.

Alloy steel: ASTM A182 F1,F5,F9,F11,F22,F91,ASTM A694 F42,F46,F52,F56,F60,F65,F70,etc.

Applications of pipe unions:

Pipe unions are used as pipe fittings in a wide variety of industrial applications like:chemical processing industries,petrochemical,pharmaceutical,food & beverage,pulp & paper,shipbuilding/marine,waste incineration,machine building,architectural,semiconductor etc.

Coating: black,yellow paint,varnish,anti-rust oil,galvanized,epoxy coating or as for clients’ requirements.

Package: In wooded cases or pallets,or as for clients’ requirements.

Haihao Group manufacture pipe unions according to different materials and standards,we also can supply other pipeline products such as forged pipe fittings(socket weld/threaded elbow,tee,cross,coupling,union,cap, outlet,etc),butt welding pipe fittings(45 degree/90 degree/180 degree elbows,tees,reducers,cross,cap, bend,etc),steel pipes(seamless steel pipes,welded steel pipes,casing ans tubing,etc),forged flanges(weld neck flange,slip on flange,blind flange,lap joint flange,socket weld flange,threaded flange,plain flange,etc).If you want to know more about our pipeline products,please email us:sales@haihaogroup.com