?What are Threaded Fittings
?What are Threaded Fittings
?What are Threaded Fittings
Threaded pipe fitting are metal parts that Widely placed in the path of steel pipes And by applying multiple connections in the pipes
, they practically provide the conduction path of different fluids
. Through the use of these components
, extensive piping networks can be created
, even with very complex architectures In this way
, the productivity of industrial complexes will be greatly increased
Standard threaded fittings
One of the types of threaded connections is the toothed rope and the internal gear in which it is used as a conversion
. This connection has external gear and internal gear and the wrench part of this type of connection is usually 6 ears
These connections are used to block the ends of paths It comes in two forms with an internal gear called a Cap. And an external gear called a plug
This type of connection is used to connect two pipes or one pipe to the device And has an internal gear or silent housing
The input and output of some bushings are different, which is called Reducing coupling
. If one side of the connection has a gear or housing, it is called half coupling
Tee and Cross This type of connection is used for branching and has an internal gear (female)
. The 45 and ٩٠ degree elbow is used to change direction. In left elbows (Stud elbow)
, one side has a rib and the other side has an inner rib
Nipple
The nuts are used to connect two devices and generally have an external gear (forge)
. Nuts are made in the form of a forge (male) The wrench part has 4 or 6 ears Or it is made of pipe
that can be cut and threaded to the size of 4 or 4 inches or any size
. The input and output of some brains are different
, which is called reducing nipple
. If the tube core has 2 different sizes, it is called a swage nipple
Union
nut Pipe nuts are multi-piece fittings that To connect pipes
or fittings to devices in places where Used in terms of space
or movement of equipment
Threaded polyethylene fittings (mechanical) Threaded connections from size 20 to 110 mm with polypropylene copolymer raw materials in accordance with INSO 14474
, ISO 14236 and ISO 9625 standards, such as: Three-way, knee, interface
, conversion, flange, male and female clamp, belt end clamp
Gear fittings
Probably one of the oldest methods of connecting piping systems
. Silent welded fittings are mainly used for small diameter pipes
. Usually for a nominal diameter of 2 inches or less
. Dimensional standard for conical threads is provided in ASME B1.20.1. In this standard
, all dimensional requirements
, including the number of threaded gears per inch
. Thread diameter, and length requirements for all pipe diameters
Application of threaded connections
Threaded joints are commonly used in low-cost
, non-sensitive areas such as residential plumbing, fire extinguishing systems and industrial cooling systems
. And usually from ordinary cast iron and unbreakable cast iron and brass and bronze alloys and Or forged brass and bronze alloys (carbon) and carbon steel and stainless steel are made
. Threaded joints are available in the same pressures as 2000lbs
, 3000lbs, 6000lbs
NPT threads
All connections described on this page are NPT
(NPT: American National Pipe Thread Tapered)
which is One of the most widespread and well-known types of threads is the degree to which The thread is subject to both hydraulic sealing pressure and mechanical connection pressure
. Threaded fittings are designed as male or female conical By Teflon tapes or liquid materials such as adhesives and special industrial resins
Made for this purpose are sealed
Advantages and disadvantages of threaded joints Advantages: On average
, it has a high installation efficiency and does not require special experience and skills in installation
. Non-leakage integrity at low pressures and low temperatures and where the system does not vibrate
. Disadvantages: Rapid temperature changes in the system cause expansion differences Between pipes and fittings may lead to leaks in the piping system
. Vibrations can be accompanied by aggravating factors such as pressure Causes high stress on the connection thread And eventually cause breakage at the base of the threads
. The use of threaded connections in the piping of high-risk systems should be avoided as much as possible
. Vulnerability of threaded joints against wear and tear is very important
, Especially where uncoated threads are exposed to corrosion.