News
News
Analyzing Stainless Steel Flanges in LNG Gasification Stations (Part one)
- Posted: 03/29/2023 02:03:59
- Hits: 17
1.1 Analysis of failure mechanism of corrosion Austenitic stainless steel 304 has excellent corrosion resistance and weldability. Studies have shown that the main forms of corrosion of austenitic stainless steel 304 welding seam are intergranular corrosion and stress corrosion. 1. 1. 1 Intergranular...
Inspection of Stainless Steel Flanges of LNG Gasification Stations
- Posted: 03/15/2023 10:03:49
- Hits: 33
Abstract: After an LNG gasification station was put into operation for 10 years, leakage due to corrosion was found in the heat-affected zone of the stainless steel flange at the liquid phase inlet of the air-temperature gasifier and the gas phase outlet of the storage tank from the supercharger. Chemical...
Causes of Cracks in 304 Stainless Steel Pipe Fittings
- Posted: 02/08/2023 07:02:05
- Hits: 377
Stainless steel 304 has good heat resistance, corrosion resistance, cold and hot processing and welding, and is widely used in high-temperature corrosion parts of oil refining and chemical equipment, which is very important to ensure the safe operation of the equipment. During the inspection of a new...
Failures of Welding Seams of Slip-on Flanges of Thermal Pipelines
- Posted: 01/28/2023 12:01:58
- Hits: 51
When the heating medium is hot water, the working pressure is up to 2.5MPa due to the low pressure of the thermal pipeline. When the heating medium is steam, the working pressure is up to 1.6MPa. Therefore, in the construction process, the pipeline and its components adopting low carbon steel can meet...
Application of TIG Welding to SS Slip-on Flanges (Part two)
- Posted: 12/25/2022 10:12:13
- Hits: 50
4. Welding steps (1) Requirements for base materials: stainless steel 304, 304L, 316, and 316L are used for slip-on flanges and pipe fittings, and it is better to use the same type of stainless steel for flanges and pipes. The diameter d of the inner hole of the slip-on flange is slightly larger than...
Application of TIG Welding to SS Slip-on Flanges (Part one)
- Posted: 12/11/2022 10:12:47
- Hits: 43
Abstract: Stainless steel slip-on flange and pipe fittings are connected by TIG welding, and self-flux welding is adopted for the flange’s sealing surface. The non-sealing surface of the flange is welded with wire to realize the function of the connection of the flange. 1. Introduction...
Control Deformation Caused by Welding of Slip-on Flanges with Large Diameters
- Posted: 10/22/2022 10:10:02
- Hits: 185
Abstract: In the manufacturing process of pressure vessels, deformation caused by the welding of slip-on flanges with large diameters often occurs. By analyzing the causes of deformation, the measures to control the deformation are proposed to provide guidance for preventing deformation caused by welding...
Research on the Manufacturing Process of Large Flanges
- Posted: 09/24/2022 10:09:46
- Hits: 30
With the advancement of science and technology, modern petrochemical enterprises are developing in the direction of large scale and complication. The large-scale equipment has brought opportunities to the manufacturer, but it has also brought greater challenges. In the manufacturing process of large...
Cracks & Corrosion in the Heat-affected Zone of DSS Flange (Part One)
- Posted: 09/10/2022 05:09:21
- Hits: 14
Abstract: Aiming at the leakage during the testing of the seawater pipeline system of a nuclear power plant, from the construction to the testing process, the multi elimination methods were used to analyze the corrosion. By analyzing the properties of the material, distribution of stress, and the medium...