Elbow, pipe installation commonly used in a connection with pipe fittings, connecting two nominal diameter of the same or different pipe, so that the pipe to make a certain angle turn. The bending radius is less than 1.5 times times the diameter of the pipe is the elbow, more than 1.5 times times the pipe diameter belongs to the bend pipe. According to the angle, there are 45掳 and 90掳180掳 three kinds of most commonly used, Elbow in addition to engineering needs also include 60掳 and other non-standard angle elbow. Elbow materials are cast iron, stainless steel, alloy steel, malleable iron, carbon steel, non-ferrous metals and plastics.

Elbow is a common connection used in plumbing installation to connect the pipe corners to change the direction of the pipe.

Other Name: 90掳 elbow, right angle bend, love and bend, stamping elbow, pressing elbow, mechanism elbow, welding elbow, etc.

Use: Connect two nominal diameter of the same or different pipe, Elbow so that the pipeline for 90掳, 45掳, 180掳 and various degrees of turning.

The bending radius is less than 1.5 times times the diameter of the pipe is the elbow, more than 1.5 times times the pipe diameter belongs to the bend pipe.

Elbow maintenance methods are many, in the use and maintenance of elbows need to pay attention to a lot of things, need users in accordance with a certain method to use, Elbow in accordance with the correct and reasonable method of use and maintenance. Need to use in accordance with a certain process method to ensure that the use of Soumei and the length of the elbow. The following describes the maintenance and maintenance of the elbow methods, precautions, etc.:

1. Before installation, we must carefully check the various standards of the elbow, whether the path is in line with the use requirements, eliminate the defects caused by the transportation process, Elbow and eliminate the dirt of the elbow, ready to be ready before installation.

2. Long-term storage of elbow, should be regular inspection, often on the exposed surface of the processing must be kept clean, clean dirt, neatly stored in the indoor ventilation and dry place, Elbow is prohibited from stacking or open storage. Often keep the elbow dry and ventilated, keep the clean and tidy, in accordance with the correct storage method.

3. When installed, the elbow can be connected directly to the tube on the road, in accordance with the location of the installation. Under normal circumstances, can be installed in the pipeline at any location, but to facilitate the operation of the overhaul, note that the cut-off elbow media flow should be the vertical disc below the upper, elbow only horizontal installation. Elbow in the installation should pay attention to the tightness, Elbow to prevent leakage phenomenon, affect the normal operation of the pipeline.

4. Elbow in the use of the process, should be kept clean, transmission thread must be regularly lubricated, found fault, should be immediately stopped use, Elbow to identify the cause of clear failure.

5. Elbow application Handwheel, do not use leverage or other tools to avoid damage to valve parts. The handwheel rotates clockwise to turn off and the reverse is turned on. The use of the child should be reasonable, to ensure the correct use of methods and means.

6. Elbow valve filler gland bolts should be evenly tightened, Elbow should not be pressed into a crooked state, so as to avoid injury to prevent stem movement or cause leakage.

7. Elbow ball Valve, globe valve, gate valve use, only for open or full closed, do not allow to adjust the flow, lest the sealing surface by erosion, accelerated wear. The gate valve and the upper threaded globe valves have a reverse sealing device, and the handwheel is screwed to the top position to prevent the media from leaking from the stuffing. Elbow maintenance and maintenance is necessary, in the event of failure to repair and repair in a timely manner, it needs to be constantly maintained to ensure the normal service life of the elbow.

Bending Technical Requirements

1, because most of the pipe fittings for welding, in order to improve the quality of welding, the end of the Cheng Chengpo mouth, leaving a certain angle, with a certain edge, this request is also more stringent, the side of the thickness, the angle of how much and the scope of the deviation are provided. Surface quality and mechanical properties are basically the same as pipes. For easy soldering, Elbow the fittings are the same as the steel of the pipe being connected.

2, is all the pipe fittings to undergo surface treatment, the internal and external surface of the iron oxide skin through the spray shot treatment, and then coated with anti-corrosion paint. This is for export needs, moreover, in the country is also to facilitate transport to prevent corrosion and oxidation, Elbow we have to do this work.

3, is the requirements for the packaging of small pipe fittings, such as export, you need to make wooden cases, about 1 cubic meters, stipulating that the number of elbows in this box can not be more than a ton, the standard allows the package, that is, large sets of small, but generally not more than 1 tons weight. Elbow For large y will be a single package, like 24鈥 must be a single package. The other is the packaging mark, marking is to indicate the size, steel number, lot numbers, manufacturers trademarks and so on.