Flange

In piping systems, the type of flange seal face often determines the upper limit of the entire sealing system. While many focus on flange material and pressure ratings, the importance of matching seal faces is often overlooked. The seal face plays a crucial role in: Gasket compression ability Corrosion resistance to the medium Ease of […]

Flanges based on the American Class and European PN standards are among the most commonly used in the engineering field. These two flange standard systems differ significantly in pressure ratings, application ranges, and structural designs. Understanding these differences is crucial for engineers and purchasing professionals in making informed decisions regarding equipment selection, installation, and maintenance.

1. General Principle – Insulation Not Always Required Under normal environmental conditions, the fill fluid inside the dual-flange capillary (commonly silicone oil) has sufficient temperature tolerance. It can adapt to routine ambient variations without additional thermal protection. In such cases, thermal insulation is not mandatory, reducing both cost and maintenance workload. 2. Situations Where Insulation

1. Role of Surface Roughness in Flange Sealing Surface roughness of the flange sealing face is a critical factor in ensuring a leak-tight connection. A controlled “serrated” finish enables the gasket to undergo plastic deformation and interlock with the flange surface. Proper roughness creates sufficient frictional resistance to prevent gasket blow-out under internal pressure. The

1. Introduction In industrial piping systems, flange connections play a vital role in ensuring mechanical strength and sealing integrity. The core element of a flange connection lies in its facing type (also referred to as the sealing face).Different flange facings are designed to withstand varying pressure ratings, temperature ranges, and process media characteristics. Selecting the

1) Thread Connections (Abbreviations & Meanings) Abbrev. Full Name Standard / System Notes NPT National Pipe Taper ANSI/ASME B1.20.1 Tapered pipe thread; seals on the threads. NPTF National Pipe Taper Fuel ANSI/ASME “Dry-seal” tapered thread; enhanced leak-tightness for fuels/gases. BSPT British Standard Pipe Taper BS Tapered pipe thread; widely used in UK/Commonwealth. BSPP British Standard

In industrial piping systems, flanges play a vital role in connecting pipelines, valves, pumps, and other equipment. They ensure sealing, mechanical strength, and serviceability. However, many engineers and technicians tend to overlook a crucial aspect: the markings etched onto the flange surface. These seemingly minor letters and numbers provide essential information that can determine whether

1. Introduction In the fields of industrial automation and fluid control, process connections are critical for ensuring secure installation, excellent sealing performance, and safe operation of equipment. The Japanese Industrial Standards (JIS) system provides a unique approach to flange connections, differing from ANSI and DIN standards commonly used internationally. JIS flanges are widely adopted in

Introduction In industrial piping systems, ensuring electrical continuity and safety is critical—especially in environments where flammable or explosive media are present. One frequently asked question is whether flanges connected by five bolts (or any bolted flange connection) still require bonding straps or jumpers. This article explores the technical rationale and applicable standards behind bonding requirements

Introduction Flanges are crucial components in piping systems, providing secure connections between pipes, valves, pumps, and other equipment. To ensure proper identification and compliance with industry standards, manufacturers mark flanges with specific details. These markings provide critical information about the flange’s specifications, including material, pressure rating, dimensions, and manufacturing details. This guide will explore the