Page 3 of News about Gaskets, Bolt & Nuts

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...

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...

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...

 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,...

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...

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...

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...

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...