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,...