BLOG

BLOG

company news

Industry news

Methods of daily maintenance of flanges by flange manufacturers

Methods of daily maintenance of flanges by flange manufacturers

It is also known as "annealing", and the temperature range is 1040~1120℃. You can also investigate through the annealing furnace survey hole, and the large flanged pipe fittings in the annealing area should be incandescent, but not softened and sagged. Furnace body sealing (the outer shell is welded with steel plate and section steel, the trolley is welded by section steel and steel plate, the trolley is soft-touched with the furnace lining and sand-sealed to reduce heat radiation and convection loss, and effectively ensure the sealing of the furnace body. Brightness fades. The furnace should be closed and isolated from the outside air; if hydrogen is used as the maintenance gas, as long as one exhaust port is open (used to light the exhausted hydrogen). The way to check can be smeared with soapy water on the joints of the annealing furnace. Check to see if there is outgassing; among them, the relatively simple outgassing is the inlet and outlet pipes of the annealing furnace. This sealing ring is particularly easy to wear and needs to be checked and replaced frequently. During the installation and use of the flange, in order to ensure that the installed flange does not leak Oil spill.

28

2022

/

04

Flange manufacturers produce casting flange process flow

Flange manufacturers produce casting flange process flow

The cast flange has a small blank size, small processing volume and low cost, but has casting defects (pores, cracks, inclusions); the internal structure of the casting is less streamlined (if it is a cutting part, the streamlined shape is even worse); forged flanges are ordinary Compared with cast flanges, the carbon content is lower and it is not easy to rust. Forgings have better streamline shape, denser structure, and better mechanical properties than cast flanges. Improper forging process will also cause large or uneven grains, hardening cracks, and forging costs are higher than casting. flange. Flange manufacturers produce casting flange process flow Forgings can withstand higher shear and tensile forces than castings. The advantage of casting is that it can produce a relatively complex shape and the cost is relatively low; the advantage of forging is that the internal structure is uniform, and there are no harmful defects such as pores and inclusions in the casting; from the production process, the difference between casting flanges and forging flanges, For example, centrifugal flanges are a type of casting flanges.

28

2022

/

04

Characteristics and connection of carbon steel flanges

Characteristics and connection of carbon steel flanges

Carbon steel flange, that is, the flange or end flange connection whose body material is carbon steel. The flanges containing carbon steel are called carbon steel flanges. Common materials are cast carbon steel grades WCB, forgings A105, or Q235B, A3, 10#, #20 steel, 16 manganese, 45# steel, Q345B, etc. Carbon steel flanges are in use, different characteristics are, and users who know carbon steel flanges may know that carbon steel flanges have intense scrubbing at the beginning and sealing process, the object is more severe reliability, it has two sealing surfaces, And has a strong sealing function, which is often used. Use some suspension medium.

28

2022

/

04

What is the cause of flange leakage?

What is the cause of flange leakage?

1. Reasons for flange leakage: wrong mouth A staggered joint means that the pipe and flange are vertical, but the two flanges are not concentric. The flanges are not concentric, so the surrounding bolts cannot freely pass into the bolt holes. In the absence of any other method, the only way is to screw a counterbore or small bolt into the bolt hole, which reduces the tension on both flanges. Also, the sealing surfaces of the sealing surfaces are also biased, which is very prone to leaks. 2. Reasons for flange leakage: Corrosion effects Because the gasket is corroded by corrosive medium for a long time, the chemical change of the gasket occurs. Corrosive media penetrates into the gasket, the gasket begins to soften, loses compressive force, and causes the flange to leak. 3. Reasons for flange leakage: partial mouth Offset means that the pipe and the flange are not perpendicular, not concentric, and the flange surface is not parallel. Flange leakage occurs when the internal medium pressure exceeds the load pressure of the gasket. This condition is mostly caused by installation or maintenance and is easier to spot. As long as the actual inspection is done, accidents can be avoided.

28

2022

/

04

What should be paid attention to in flange installation?

What should be paid attention to in flange installation?

1. To organize regular inspections. Work surfaces that are touched frequently should be kept clean and then stored neatly in a dry place. It is forbidden to stack or store in the open air, and keep the stainless steel elbow dry and ventilated. flange mount 2. Make preparations before installation. Before installation, be sure to carefully check the various standards of stainless steel elbows: for example, whether the diameter of the elbow meets the requirements, which can still be an issue during transportation. For example, if there is damage, if there are problems with the elbow, be sure to eliminate these problems before completing the installation of the elbow.

28

2022

/

04

< 12 >

Search for Products