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Why Is It Not Recommended to Use SS304 for Sealing Bolts of Flange Connections?
- Posted: 10/16/2021 11:10:30
- Hits: 434
When the carbon steel or stainless steel flange is equipped with SS 304 bolts in the flange's sealing, leakages often occur in the operating state. (1) What are the differences between 304, 304L, 316 and 316L? 304, 304L, 316 and 316L are commonly used stainless steels in flange connections, including...
Anti-corrosion Technology of Oil and Gas Pipeline's Flanges and Bolts (Part Three)
- Posted: 09/12/2021 09:09:40
- Hits: 17
1.6 Viscoelastic anti-corrosion systems The viscoelastic body is mainly an anti-corrosion product developed by the Dutch company STOPAQ. It is a polyolefin-based flexible heavy-duty anti-corrosion material with a single-molecule non-bonded structure. This single-molecule non-bonded structural feature...
Anti-corrosion technology of oil and gas pipeline's flanges and bolts (Part Two)
- Posted: 08/24/2021 10:08:27
- Hits: 32
1.2 Molybdenum disulfide or grease The anti-corrosion technology of applying molybdenum disulfide or grease (calcium based grease) is one of the common ones used in anti-corrosion for metal. Because of the adhesion and lubricity of Molybdenum disulfide or grease, it can effectively...
Anti-corrosion Technology of Oil and Gas Pipeline's Flanges and Bolts (Part One)
- Posted: 08/09/2021 10:08:39
- Hits: 85
Abstract In the operation of oil and gas pipelines, flanges and bolts are often damaged by metal corrosion, which seriously affects their overall safety. Six mainstream anti-corrosion systems and their basic construction methods at home and abroad are introduced and analyzed, and their advantages...
Reasons for Cracks of Flanges
- Posted: 07/26/2021 11:07:43
- Hits: 306
A flange is a commonly used component in the pipeline. When a flange is connected to the pipeline, the welding is often adopted. However, if welding is not done properly, it will cause cracks between the flange and stainless steel pipe. Then, why do cracks appear for a flange in the welding process?...
The Research Method of Tightness of Bolted Flanges
- Posted: 05/10/2021 10:05:55
- Hits: 14
Sealing and leakage of bolted flanges In the past, people thought of the bolted flange connection being completely sealed or no leakage at the joint as that the pre-tightening pressure force on the gasket in the pre-tightened state cannot be less than the pre-tightened seal specific pressure y of the...
An Introduction to Flanges' Connections
- Posted: 04/06/2021 02:04:59
- Hits: 135
Flanges should not only meet the requirements for strength but also leakage rates when working. In addition, they should also have characteristics of convenient assembly and disassembly, low economic costs and good interchangeability. As shown in the Figure 1-1, the bolted flange...
A Brief Introduction to Butt Welding Flanges
- Posted: 03/08/2021 09:03:58
- Hits: 157
A butt welding flange is a kind of pipe fitting, which connects to the pipe. A butt welding flange is not easy to deform, has good sealing performance and wide applications. It is suitable for pipelines with large fluctuations in pressure or temperature as well as high-temperature, high-pressure...
Technical Requirements for Flange Connections
- Posted: 01/19/2021 02:01:36
- Hits: 187
Generally, pipe flanges are only used for connecting flanged valves, instruments and equipment. Except the equipment that needs to be disassembled during maintenance, others had better not be connected with flanges. Excessive use of flanges will increase the possibility of leakage...