News about Gaskets, Bolt & Nuts

Gasket Types & Selection for Industrial Flanges

Spiral-Wound Gaskets (1) Applicable Scope of the Spiral-Wound Gasket According to the petrochemical industry standard SH 3407-2013, spiral-wound gaskets are suitable for the following conditions: Nominal pressure range: PN 1.0–25.0 MPa Temperature range: Stainless steel strips with special asbestos filler: –50 to 500 °C Stainless steel strips with flexible graphite filler: –196 to 800 °C (≤ 600 °C for oxidizing media) Stainless steel strips with PTFE filler: –196...

Mar 20, 2025

Standards and Selection of Gaskets

Standards and Selection of Gaskets This article provides a comprehensive overview of gasket standards, manufacturer selection criteria, and selection methodologies. It outlines key gasket standards used in the chemical and petrochemical industries, specifies requirements for gasket manufacturers, and discusses critical factors in gasket selection, including pressure, temperature, and medium compatibility. Various gasket types—such as asbestos-rubber, PTFE, and spiral-wound gaskets—are...

Mar 09, 2025

The Tightening Sequence of Flange Bolts and Nuts

The Tightening Sequence of Flange Bolts and Nuts Flange connections are widely used in industrial pipeline systems, pressure vessels, and other equipment. The tightening sequence of flange bolts and nuts is crucial for ensuring the sealing reliability and safe operation of the equipment. A proper tightening sequence ensures uniform force distribution across the flange surface, preventing localized over-compression of the gasket, which could lead to damage or leakage. The primary...

Feb 27, 2025

How to Tighten Flange Bolts and Nuts Properly?

How to Tighten Flange Bolts and Nuts Scientifically and Properly? I. Technical Requirements for Tightening Flange Bolts and Nuts During Equipment and Pipeline Flange Installation 1. Inspection of Flange Fasteners Gaskets: During installation, ensure the gasket is new, clean, and dry. Inspect the gasket for any defects or damage. Old gaskets must not be reused. Before installation, confirm that the gasket size and grade match the markings on the flange. Flanges: Before installation,...

Feb 12, 2025

Materials Selection of Low-Temperature Flange Gaskets

Materials Selection of Low-Temperature Flange Gaskets 1. Materials Selection of Sealing Gaskets There are various types of flange gaskets, which can be broadly categorized into three groups based on their material properties: metal gaskets, metal-nonmetal composite gaskets, and nonmetal gaskets. According to their functions, they can be classified as low-temperature-resistant gaskets, reliable sealing gaskets, and corrosion-resistant gaskets. 2. Low-Temperature Resistance Performance Commonly used...

Jan 18, 2025

The Application and Important Role of Flange Gaskets

The Application and Important Role of Flange Gaskets 1. Application in Pipeline Systems Flange gaskets are one of the most common sealing components in pipeline systems and are widely used in industries such as chemical, petroleum, natural gas, and power. In pipeline systems, flange gaskets are typically installed between flanges. Through compression, they seal the connections in the pipeline system, preventing medium leakage and ensuring the system's safe operation. 2. The Important Role of...

Jan 08, 2025

Installation Notes for Flange Gaskets

Installation notes for flange gaskets Notes for gasket installation The sealing surface of gaskets and flanges should be cleaned thoroughly, and there should be no defects such as scratches or spots that affect the sealing performance of the connection. The outer diameter of the gasket should be smaller than that of the flange sealing surface, and the inner diameter of the gasket should be slightly larger than the inner diameter of the pipeline. The difference between the two inner diameters...

Dec 24, 2024

Selection of Flange Gaskets

A gasket is a mechanical seal between two objects, and if selected properly, it can usually effectively prevent material leakage between the two objects. Improper selection can result in unnecessary losses. Today, we brought you the selection methods for flange gaskets. Let's learn together. Sealing mechanism of flange gaskets The leakage occurs when the medium flows through the interface between the inner and outer spaces is the leakage of the sealing surface. The fundamental cause of...

Dec 12, 2024

Functions and Characteristics of Asbestos Gaskets

What is an oil resistant asbestos gasket? What are the functions of oil resistant asbestos gasket? What are the characteristics of oil resistant asbestos gasket? Now let's learn about oil resistant asbestos gaskets. Oil resistant asbestos gaskets are mainly used in the rubber industry. With the gradual recovery of natural rubber prices in Yunnan, the entire rubber industry has also made great progress. Oil resistant asbestos gaskets are mainly made by processing high-quality asbestos...

Nov 28, 2024

Where Are Asbestos Flange Gaskets Used?

Where Are Asbestos Flange Gaskets Used? Oil resistant asbestos gaskets, also known as asbestos gaskets, are made mainly from asbestos fiber, styrene butadiene, butadiene rubber, natural, and EPDM rubber, supplemented with rubber compounding agents and fillers. It is produced through processes such as mixing, hot rolling, and vulcanization. Asbestos cotton gaskets are mainly used in the sealing of medium and low pressure flange connections. The WD-4 product has excellent permeability and affinity...

Nov 12, 2024

Key Roles in Pipeline: Flanges, Gaskets and Bolts and Nuts

Key Roles in Pipeline Systems: Flanges, Gaskets and Bolts and Nuts In complex pipeline systems, flanges, gaskets, and bolts and nuts are indispensable components. These seemingly simple components actually play a crucial role in ensuring the safe and efficient operation of pipeline systems. 01. Flange: Bridge for pipeline connection Flanges are key components in pipeline connections, mainly used to tightly connect two pipelines or pipelines with equipment. A flange typically consists of two...

Oct 25, 2024

The Sealing Mechanism of Gaskets And Main Leakage Factors

The Sealing Mechanism of Gaskets And The Main Factors Affecting Flange Gasket Leakage Sealing mechanism of gaskets Firstly, connect the two parts of the flange connection together with bolts, then pre-tighten the bolts and apply force to the gasket through the flange compression surface, causing the gasket to undergo elastic or plastic deformation and fill the flange compression surface, achieving a sealing effect. The sealing effect of flanges is closely related to the performance of gaskets and...

Oct 10, 2024