Flange inspection procedure and video

Flange inspection procedures, Flange inspection videos.

First, the conventional flange inspection procedures

1. Purpose

In order to strengthen the quality management of forged flanges, the quality control mark before moving to the factory, specially formulated this requirement, as the forging flange in addition to the implementation of the contract technical annex and the contract design, manufacture, inspection and testing Standards should also meet the requirements, and as a basis for factory inspection. Such as technical annex, the contract design, manufacturing and test standards, the conflict between the requirements, according to the higher requirements of the implementation.

the scope of application

This requirement applies to wafers that apply to a wide range of specifications. 3, the procurement of raw materials and re-inspection

 2 inspection of the material

2.1 Check if the material number on the process card matches the actual size.

2.2 Check the size of the inside and outside diameter of the flange with the ruler.

2.3 Check whether the marking of the flange after the transplant is completed.

2.4 inspection of splicing flange and chemical inspection by PMI. flange PMI video youtube link as below.

2.4.1 Check the appearance quality of the weld groove with a visual inspection and check the geometrical dimensions of the weld groove with a weld angle. Visual inspection of weld appearance quality.

2.4.2 Ultrasonic inspection of the inherent quality of the weld, shall not have slag, cracks and other defects, and meet the relevant standards.

2.4.3 on the flange to eliminate stress heat treatment, check the heat treatment temperature and holding time and cooling methods.

3 Dimension inspection.

3.1, all for the manufacture of forging flange raw material procurement channels must be identified to the supplier.

3.2 Measure the following dimensions with caliper, ruler or tape measure:

Inner diameter, outside diameter, thickness, sealing surface diameter, flange neck, neck diameter, bolt hole center circle diameter, bolt hole Spacing, bolt hole diameter.

3.3 Place the flange on the platform and measure the height of the flange with a depth caliper.

3.4 Checking the eccentricity of flange inner diameter to the center of the bolt hole and the center of the sealing surface.

A. Place the flange on the platform, measure the distance between the corresponding bolt hole and the inner wall of the flange with the caliper, and the corresponding

The large value is the amount of eccentricity.

B. Place the flange on the platform, measure the corresponding width of the sealing surface with the caliper, and the corresponding value in the corresponding difference is

Heart volume.

4 inspection of appearance quality

4.1 machined surfaces shall not have burrs, hazardous scratches and other defects that reduce flange strength and connection reliability.

4.2 The two sides of the ring groove sealing surface shall not have surface defects such as cracks, scratches and bruises caused by machining.

4.3 Flange surface roughness using the same material standard block for comparison.

4.4 the flange marking shall be according to MSS SP25 ASME B16.5 2020. Below is flane marking video.

C&N Range

| elbow | tee | cross | reducer | bend | cap | coupling | plug | nipple | olet | Thread fittings | Butted weld fittings | Socket fittings |

| Flanges : slip on | weld neck WN | orifice | blind | thread | socket weld | SAE | reducing | Ring Joint Flanges | spetacle flange |

| Seamless steel pipe | weld steel pipe |

For more infomration, please visit http://www.cnpipefitting.com/ and https://pipefittingflange.com