What accessories are included in a set of flanges
Contents
- Introduction
- What is a flange set?
- What accessories are included in a flange set?
- Extension components for special working conditions
- Supporting accessories and selection recommendations
- Summary
Introduction
Flanges are essential components in industrial piping, but companies need more than just flanges when purchasing them. Flanges also require other accessories, and the quality of these accessories often determines the quality of the project.
This article will focus on the components included in a flange set, as well as the component composition in specific environments. We hope this article will be helpful.
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What is a flange set?
A flange set refers to a group of accessories used to connect pipes, valves and other equipment, including flanges, flange gaskets, flange bolts, etc.

What accessories are included in a flange set?
A set of flanges not only includes flanges, but also other related accessories, mainly including some accessories:
Flange plate
A flange is a ring-shaped part used to connect pipes, valves, and other equipment between two flanges. It is usually made of cast steel, stainless steel, plastic, and other materials. Commonly used flanges include flat welding flanges, butt welding flanges, and screw-on flanges.
Flange gasket
Flange gaskets are usually located between flanges to provide a seal. Common materials include rubber, paper, plastic, and metal. Different materials can be selected according to different working conditions.
Flange bolts
Flange bolts are bolts that connect flange plates. They are generally made of high-strength alloy steel. Their diameter and quantity depend on the specifications and pressure rating of the flange.
Flange nuts
Flange nuts are used to secure flange bolts. Generally, nuts made of the same material as the flange bolts are used.
Gaskets
In some cases, it is necessary to install another layer of gasket on the flange gasket to achieve a better sealing effect. The material and shape of the gasket can be selected according to specific requirements.

Extension components for special working conditions
- Reinforcement Ring: For high-pressure flanges PN 16 and above, enhancing rigidity.
- Anti-corrosion Coating: Epoxy resin spray coating, commonly used in the chemical industry, resists acid and alkali corrosion.
- Dowel Pin: Required for large-diameter flanges (DN ≥ 500) to ensure docking accuracy.

Supporting accessories and selection recommendations
- Temporary blind plate: Used to seal the pipe during pressure testing. Thickness calculated based on pressure.
- Locking gasket: Prevents bolts from loosening in vibrating environments.
- Sealant: Assists in gasket sealing. Temperature resistance range: -40°C to 260°C.

Summary
A flange set typically consists of a flange plate, flange gasket, flange bolts, flange nuts, and gaskets.
Choosing the right flange set and its components is crucial when installing and maintaining pipes, valves, and other equipment to effectively prevent problems such as leaks and loosening.
Metleader not only provides customers with high-quality flanges and flange accessories, but also offers complete project solutions, helping customers select the best and most suitable products.
