American Flange
American Flange is a pipeline connection component designed in compliance with the American standard system (ASME B16.5/B16.47), primarily used in high-pressure and high-temperature systems such as petroleum, chemical, and nuclear power industries. It achieves sealed connections between pipes, valves, and equipment through bolt fastening. Compatible with ISO and DIN standard dimensions, it supports cross-border project integration, while its imperial unit-based design distinguishes it from the metric system employed in national standards .
American Flange Specifications
Core Standards
ASME B16.5:
American Society of Mechanical Engineers led, covering nominal diameters
NPS: 1/2“~24” (DN15~DN600)
Pressure class Class 150~2500, applicable to petroleum, chemical, electric power and other medium and high pressure scenarios.
ASME B16.47:
For large diameter flanges
NPS 26“~60”, DN650~DN1500, refining the structural requirements, adapting to oil and gas transmission pipelines and other ultra-large-scale systems 26.
ANSI Standard:
As a general specification, emphasizing compatibility, widely used in conventional industrial equipment connections, providing flexible options (e.g. ANSI B16.36 air hole flanges)
Sealing Face Types
Raised face (RF): standard form, adapted to rubber gaskets, for conventional sealing.
Ring joint face (RTJ): metal ring gasket seal, high pressure and high temperature resistant (>Class 900), for oil and gas wellhead installations
Type of construction
Butt-welding flanges (WN): welded neck design, high pressure and fatigue resistant, suitable for main steam piping in nuclear power plants and chemical reactors.
Slip-on flange (SO): easy to install, low cost, suitable for low pressure water treatment systems.
Blind flange (BL): used to close off the end of piping to support system overhaul or pressure testing.
American Flange Advantages
High-Temperature & High-Pressure Adaptability
Utilizes a dynamic pressure-temperature model to match pressure requirements across operational conditions via lookup tables, ensuring reliability in high-temperature and high-pressure environments.Material options include ASTM A105 carbon steel and A182 F316 stainless steel, covering pressure classes from Class 150 to Class 2500.
Superior Sealing Performance
Raised Face (RF) accommodates rubber/graphite gaskets with leakage rates <0.1%; Ring-Type Joint (RTJ) employs metal ring gaskets for extreme high-pressure sealing in Class 900+ systems.Welding processes enhance joint strength through full-perimeter welding to prevent leakage risks.
Global Compatibility
Dimensional alignment with ISO and DIN standards supports integration in multinational projects.Imperial unit design seamlessly interfaces with global engineering systems.
Manufacturing & Reliability
Forging and heat treatment processes improve material density, with stringent tolerance controls to minimize installation deviations.High-grade flanges are engineered for extreme applications such as deep-sea oil extraction and nuclear power plant primary pipelines