Description

In a piping system, an elbow is a fitting that changes the direction of a pipe run. According to the angle, there are three kinds of most commonly used: 45°, 90°, 180°. In addition, according to the needs of the engineering road, there are other abnormal angle elbows such as 60 °. According to the material, there are cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, non-ferrous metals and plastics. According to the production process, there are welding elbow, stamping elbow, pushing elbow, casting elbow, etc. The extension lines of two nozzles of 45 degree elbow intersect into an acute angle, while 90 degree elbow knows that the extension lines of two nozzles are vertical. A blunt angle is formed after connecting pipes on both sides of a 45 degree elbow, while a right angle is formed after connecting pipes on both sides of a 90 degree elbow. It is not allowed to weld two 45 degree elbows into 90 degree elbows for use. Elbows are the concentration area of stress on pipes, and most of the stress of expansion and cooling deformation are released at elbows. Weld itself is a weak link, fatigue deformation will cause cracking damage.

Specification

Material: carbon steel

Size range: DN15-700

Pressure range: 3000lb, 6000lb, 9000lb or sch80, sch160 and XXS

Surface treatment: anti-oil; anti-painting

Technical data sheet

Technological process

1, Material selection and blanking, select appropriate steel plate, cut, and mark the furnace, batch number, pipe fitting specification, project name and number of raw materials clearly.

2, The elbow is pressed and welded to form, and the circumferential pressure is kept balanced during the pressing process.

3, Heat treatment: according to the heat treatment process. Surface treatment: after heat treatment, the surface oxide skin of pipe fittings shall be removed by sanding machine to make them show metallic luster.

4, Nondestructive testing of elbow: commonly used magnetic particle, ultrasonic, penetration and radiographic testing methods to detect surface defects.

5, End machining: machining groove of mechanical end face according to design confirmation drawing.

6, Appearance inspection: the elbow shall be free of cracks and other phenomena, and the surface shall be free of hard spots.

7, The inner and outer surfaces of elbows shall be smooth without damage to strength and appearance defects. No welding repair is allowed for any defect on the elbow body.

8, Dimension inspection: calibre measurement; center height measurement; wall thickness measurement; roundness measurement; hardness measurement; groove measurement; horizontal deviation measurement; oblique deviation measurement.

9, Pickling, passivation and marking.

Features and Application

Carbon steel socket welding elbow mainly includes hot push forming process and stamping forming process. It is mainly applicable to petrochemical power, aerospace, military industry, fire protection, metallurgy, shipbuilding, gas, nuclear power, environmental protection and other departments and fields requiring high pressure and precise size.

Package

a. Plastic bubble bag package b.Wove bag package c.Pallet d. Customized

Delivery time

Our factory have high ability for production, the delivery time is 45days for small quantity, or if you are hurry for that, we can arrange and meet your shipping date.