Forming Technologies

Cold Pressing

Taking advantage of the characteristics of plastic deformation of metal, the microscopic convex peaks on the surface of the workpiece are flattened by applying pressure, thereby reducing the surface roughness. High pressure is applied in the mold cavity to make a compact molded blank. Including surface rolling, surface extrusion processing, etc. Suitable for polycarbonate, polypropylene and other materials. By cold pressing processing, the tensile strength and elastic modulus of the material can be improved.

Forging

Select the right metal material and perform necessary pretreatment, such as cutting, cleaning, etc.Heat the metal blank to a certain temperature to increase its plasticity and reduce deformation resistance. Under the blow or pressing of a forging hammer or press, the metal blank flows plastically in the mold to form the desired shape. The metal is freely deformed in all directions using impact force or pressure.Forged in special molds, the forgings produced are accurate in size.After the forging is complete, the forging is cooled to secure its shape and performance. Including heat treatment, machining and surface treatment, etc., to improve the performance and accuracy of forgings.

Mandrel Forming

Design appropriate shaft shape and size according to machining requirements. Precision metal processing technology, such as turning, grinding, etc., is used to produce high-precision mandrel. Install the manufactured mandrel on processing equipment such as lathes or grinders and debug it to ensure that it can support the workpiece stably. When processing thin-walled metal pipes, mandrel is often inserted into the inner cavity of the pipe, and radial support avoids deformation during turning, achieving high-precision processing.

Comprehensive Size Ranges

The 90-degree radius elbow has a wide range of applications in petroleum, chemical industry, natural gas and other fields. Its specifications and dimensions comply with multiple standard systems. According to the commonly used national standards GB/T 12459-2017 and ASME B16.9 standards, the specifications and detailed dimensions of 90-degree radius elbows are all in millimeters (mm)

★ ASTM GB/T 12459-2017

Nominal diameter DN	Outer diameter D	radius of length R
15	21.3	22.5
20	26.9	30
25	33.7	37.5
32	42.4	48.5
40	48.3	60
50	60.3	76.5
65	76.1	98.5
80	88.9	121.5
100	114.3	153
125	141.3	192
150	168.3	229.5
200	219.1	305
250	273	381
300	323.9	457.5
350	355.6	533.5
400	406.4	610
450	457	685.5
500	508	762
600	610	914.5

★ ASME B16.9 Standard

Nominal diameter NPS (inches)	Outer diameter OD	radius of length R
1/2	21.3	38
3/4	26.7	51
1	33.4	64
1 1/4	42.2	76
1 1/2	48.3	89
2	60.3	102
2 1/2	73	127
3	88.9	152
4	114.3	203
5	139.7	254
6	168.3	305
8	219.1	406
10	273.1	508
12	323.9	610
14	355.6	711
16	406.4	813
18	457.2	914
20	508	1016
24	609.6	1219

Welding 90° long radius elbow (elbow), specification range from DN15 - DN1200 (½"-48") to introduce its relevant dimensions in detail (unit: mm mm, refer to the national standard GB/T 12459-2017 and some commonly used dimensions in ASME B16.9)：

★ GB/T 12459-2017

Nominal diameter DN	Outer diameter D	radius of length R
15	21.3	22.5
20	26.9	30
25	33.7	37.5
32	42.4	48.5
40	48.3	60
50	60.3	76.5
65	76.1	98.5
80	88.9	121.5
100	114.3	153
125	141.3	192
150	168.3	229.5
200	219.1	305
250	273	381
300	323.9	457.5
350	355.6	533.5
400	406.4	610
450	457	685.5
500	508	762
600	610	914.5
700	711	1067
800	813	1219.5
900	914	1372
1000	1016	1524
1100	1118	1676.5
1200	1219	1829

★ ASME B16.9

Nominal diameter NPS (inches)	Outer diameter OD	radius of length R
1/2	21.3	38
3/4	26.7	51
1	33.4	64
1 1/4	42.2	76
1 1/2	48.3	89
2	60.3	102
2 1/2	73	127
3	88.9	152
4	114.3	203
5	139.7	254
6	168.3	305
8	219.1	406
10	273.1	508
12	323.9	610
14	355.6	711
16	406.4	813
18	457.2	914
20	508	1016
24	609.6	1219
30	762	1524
36	914.4	1829
42	1066.8	2134
48	1219.2	2438