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elbow (2)

A spiral pipe machine is a machine that produces a spiral pipe. Spiral pipe, also known as spiral seam thin-walled pipe, was first used in the military industry of Western countries, such as warships, steamships (supply) air system, and later used in trains, subway, mines, and other civilian facilities. By 2000, according to statistics, the application of spiral pipe in office buildings, shopping malls and metros in the United States had reached 95.6%, and the application of spiral pipe in central air-conditioning in residential buildings had reached 72.5%.

 

The special pipe is a thin-walled pipe with spiral seam made of metal strip coil. It is round, weldless, leak-free and water-free. It is mostly used for air supply and bulk material transportation instead of traditional white iron pipe (i.e. manual seam-biting iron pipe). It is a kind of air duct, full machine straight pipe, without manual knocking.

 

Its main uses are as follows:

  1. Air supply, including ventilation, such as fresh air supply and exhaust, covers a wide range of areas, such as factory workshops and production sites, which need to be discharged outdoors due to the generation of harmful gases, and also need to transport outdoor air to indoors. At this time, it is necessary to use air conveying pipelines with a large flow and low pressure. Spiral pipes are most suitable. Generally, galvanized iron tubes are used, and stainless steel tubes are used in corrosive and especially humid places.
  2. Cold air supply. The most common is the central air-conditioning pipeline, which requires insulation materials. The spiral pipe can be insulated with heat preservation material and has a beautiful appearance.
  3. Fume exhaust. The kitchens of restaurants, restaurants, and hotels all have a lot of oil fumes, which need to be discharged. The use of circular air ducts is the oil chimney. Here, the spiral pipe should be called lampblack.
  4. Dust removal. In some factories, there is a lot of dust in the workshop, and special dust removal devices are needed. The spiral duct can be used in the pipeline with larger air flow.
  5. Bulk material transportation. In the production process of some factories, loose particles need to be transported, especially those with a small proportion, such as foamed plastic particles, which use spiral pipe with low cost and good effect.

 

Because the spiral pipe machine can only produce straight pipes, elbow machines and other equipment have been developed. Among them, the double spiral elbow machine can achieve a high degree of production flexibility by operating at the same time through two individual workbenches: one is the curling workbench, the other is the biting workbench. Therefore, the machine can be used freely at any time without time-consuming conversion. Two workbenches work at the same time. The product is not only beautiful in appearance, but also firm, and light in weight.

 

 

BLKMA is a company from China. Founded in 1994, it is located in Ma'anshan, Anhui Province, China. It is only 26 kilometers away from Nanjing Lukou International Airport. It has the developed transportation system so that our customers can visit at any time. In the heavy industrial machinery in China, BLKMA is the most authoritative modern enterprise, which participated in the national Chinese pipeline machinery industry standards. In recent years, it maintains a rapid growth in sales revenue and enterprise scale according to the technological innovation and the continuous development of global markets.

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180 Degree Elbow

 

Product description

The connection form of stainless steel 180 degree steel pipe elbow     is butt welding elbow and steel pipe directly. According to its curvature radius, butt welding 180 degree elbow can be divided into long radius and short radius. Pressure grade is divided into about 17 types, which are the same as American pipe standard. The most commonly used are STD , SCH10, and SCH40. According to material, they are carbon steel, alloy steel and stainless steel.

 

Elbow(LR/SR  180°)

180 Degree Elbow Forming Type:

Mandrel-forming (so it will not reduce the wall thickness, extrusion moulding, pressing, colding working, machining, hot –bending, welded, heat treatment.

 

180 Degree Elbow Size/Dimensions:

seamless fittings 1/2"-32", welded fittings 1/2"-120"

45 Degree Elbow Wall Thickness: SCH5S, SCH10S, SCH10, SCH20, SCH30, SCH40S, STD, SCH40, SCH60, SCH80S, XS, SCH80, SCH120, SCH140, SCH160, XXS

45 Degree Elbow Bending Radius: R=1.0D, 1.5D, 2D, 3D, 5D, 8D, 10D....

 

180 Degree Elbow Standard:

GB 12459, GB/T 13401, SH3408, SH3409, ASME/ANSI B16.9, JIS B 2311/2220, DIN2617/2616/2615, GOST 1737

 

180 Degree Pipe Fitting Material

Stainless Steel:

OCr18Ni9, 0Cr18Ni9Ti, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, 00Cr19Ni10, 00Cr17Ni14Mo2,

ASTM A403-WP304, WP304L, WP304/304L, WP304H, WP316, WP316L, WP316/316L,

WP321, WP321H, WP347, WP347H

 

HOW TO CALCULATE RADIUS OF STAINLESS STEEL ELBOW?

I have my own unique views on the calculation formula of stainless steel elbow size. I hope you can learn more from the following experience.

 

  1. 1.5 times the elbow center height = diameter *1.524, which is actually the diameter * multiple. Round the number after the decimal point of the result to an integer. For example, the diameter of 219 is 200, the center height is 200*1.524=304.8, and take 305. The diameter of 114 is 100, the height of the center is 100*1.524=152.4, take 152.

 

The algorithm applicable to DN100 and above elbow radius of curvature is convenient and fast to calculate.

 

  1. Stamp height = center height + elbow radius, such as 1.5 times the diameter of 219 elbow stamp height =305+219/2=305+109.5=414.5

 

  1. Outer arc length =(center height + radius)*3.14*2/360* degree, i.e. (stamp height)*3.14*2/360* degree, from which it can be calculated that the outer arc length of 90-degree elbow = stamp height *3.14/2.

 

  1. Internal arc length =(center height - radius)*3.14*2/360* degrees.

 

  1. Elbow length = elbow center height *3.14/2* elbow outer diameter/pipe diameter +(pipe wall thickness *3)+ machining allowance, such as using 180*8 pipe cutting, push system 273 elbow, with the above formula can be calculated, blanking length =381*1.57*273/180+24=931.22mm+ machining allowance.

 

As a professional 180 degree elbow supplier, Huanshang steel welcome international customers come to visit and order.

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