Quadruple Filament Concept? Why is it called that, is there an inner wire, is there a five point or

1. The concept of four-point outer filament, so called as follows, there is an inner filament, and there are five or three cents of inner and outer filament.

The nominal diameter of the steel pipe is expressed in approximate inches: 4 minutes 4 8 inches 1 2 inches, 6 minutes 6 8 3 4 inches. There are no 3 points or 5 points for common specifications.

Outer wire, inner wire: the joint (also tubular) used for steel pipe connection, the thread on the outside is commonly known as the outer wire, and the inside of the joint is the inner wire.

2. Thread diameter conversion.

The nominal diameter of the national standard AETV valve.

The unit is mm, American standard.

The nominal diameter of an AETV valve is in inches

The conversion is as follows: 1 point = 1 8 inches = DN6

2 points = 1 4 inches = DN8

3 points = 3 8 inches = DN10

4 points = 1 2 inches = DN15

6 points = 3 4 inches = DN20

8 points = 1 inch = DN25

"Quarters" is an imperial unit.

From the imperial system one inch (inch) = 8 cents = centimeters). / r/ t. o. t9 h4 g9 p3 f$ p. g

4 points is the name of the length of the diameter of the imperial pipe, that is, 1 2 inches is equal to 15 mm in the metric system

8 j0 m) k6 n3 v, o$ 1 inch is equal to 8 points. metric t; j1 d- b3 n7 w: w* h'i6 min 3 4 inch 20mm (metric) 5

q! u" c( x1 w% s% s

4 minutes 1 2 inches 15mm (metric).

The screw of a screw with a diameter of 4 inches is quartered with a circle of threads on the outside. There are inner wires, and there are five or three points of inner and outer wires.

According to the angle, there are 45° and 90°, and other abnormal angle elbows such as 60° are also included according to the needs of the project. The materials of inner wire elbow are cast iron, stainless steel, alloy steel, calcinable iron, carbon steel, non-ferrous metals and plastics.

The heating methods of the forming process include medium frequency or high and wide frequency induction heating (the heating circle can be multi-turn or single-turn), flame heating and reverberatory furnace heating, and the heating method is determined according to the requirements of the forming product and the energy situation.

Summary. Pro, the inner and outer wire joints 4 6 points refer to the inner diameter and outer diameter of the joint. 4 points refer to the size of the inner diameter and 6 points to the size of the outer diameter.

In general, the smaller the inner diameter and the larger the outer diameter, the greater the flow rate of the joint. Therefore, when selecting internal and external wire joints, it is necessary to select the appropriate specifications according to the actual needs. If the inner diameter of the pipe you need to connect is 4 points and the outer diameter is 6 points, then you need to choose the inner and outer wire joints 4 6 points.

What does it mean for the inner and outer wire joints to be 4 points 6 points, is it 4 points for the inner wire or 4 points for the outer wire.

The hexagonal outer wire for the soft joint of the fan coil unit is 4 or 6 points.

Pro, the inner and outer wire joints 4 6 points refer to the inner diameter and outer diameter of the joint. Among them, 4 points refer to the size of the inner liquid diameter, and 6 points refer to the size of the outer diameter. In general, the smaller the inner diameter and the larger the outer diameter, the greater the flow rate of the joint.

Therefore, when selecting internal and external wire joints, it is necessary to select the appropriate specifications according to the actual needs. If the inner diameter of the pipe you need to connect is 4 points and the outer diameter is 6 points, then you need to choose or choose the inner and outer wire joints 4 6 points.

The hexagonal outer wire used for the soft fitting of the fan coil unit is 6 points. Because the soft joints of the fan coil unit are generally used to connect the pipeline, and the outer diameter of the pipe is generally larger, the outer diameter of the joint with a larger outer diameter can be connected only if the hole grinding is required. At the same time, the use of joints with a larger outer diameter can also ensure the firmness and tightness of the connection.

Therefore, the soft joints of the fan coil unit generally use the hexagonal outer wire 6-minute nuclear fibrillation joint. Da!

The inner wire 4-point threaded pipe and the outer wire 4-point threaded pipe cannot be directly connected.

Inner wire 4 minutes: The nut of a screw with a diameter of 4 inches, threaded inside.

Outer wire 4 points: The screw of a screw with a diameter of 4 inches, with a circle of threads on the outside.

Extended reading: "Quarter" is the imperial unit, and 4 cents is the name of the length of the diameter of the imperial pipe, that is, 1 2 inches is equal to 15mm in the metric system.

The outer wire is equal to the screw of the screw, that is, the thread of the circle is on the outside; The inner wire, which is equal to the nut of the screw, is threaded inside. Two inner and outer wires of the same size can be screwed together! The inner and outer filaments generally exist on pipe fittings and sanitary ware.

No, it should be one size larger.

The diameter of the outer filament is 15 mm.

The 4 points of the outer wire of 4 points are called the imperial unit, and "4 points" is the name of the diameter length of the imperial pipe, that is, 1 2 inches. Because one inch is 8 inch mm, the diameter of the 4 minute outer filament is 1 2 mm and 15 mm. The 4-point outer wire is mainly used for pipe fittings commonly used in plumbing installation.

It is divided into inner wire and outer wire, and the inner wire has no fixed diameter due to the different thickness of the pipe wall. Whether it is an outer wire or an inner wire, it is generally on the pipe fitting, and the diameter of the 4-minute inner wire is also four centimeters, but the thread is on the inner side.

There are also 3 points of outer wire and 6 points of outer wire, the diameter of 3 points of outer wire is 10 mm, and the diameter of 6 points of outer wire is 20 mm. The outer wire is a kind of connecting pipe fittings commonly used in plumbing installation, and if the connecting pipe fittings are external threads at both ends, it is called the outer wire.

Distinguish between 4 and 6 water pipes

The name of 4 water pipes and 6 water pipes is not the same, and the diameter is also different, the diameter of 4 water pipes is relatively short, generally about 20 mm, the diameter of 6 water pipes will be relatively long, generally about 25 mm, and the paving methods of 4 water pipes and 6 water pipes are not the same, many people think that the installation of faucets will use 4 pipes interface, in fact, most of the installation will use tees, if you use 4 pipes, two outlets are in the same water inlet pipe, so when paving 4 pipes, you should use a water inlet pipe with a relatively large diameter.

4 and 6 are suitable for the use of the world area is not the same, if the house type is a kitchen and a bathroom, in this case, the water pipe will be divided into two ways, one water pipe is set in the kitchen, one water pipe is set in the bathroom, the kitchen water pipe is recommended to use 4 pipes, and the bathroom water pipe is suitable for 6 pipes.