Categoria: Blog

Understand flange parts and flanges body part functions, including the flange face, hub, bore, bolt holes, bolt circle and gasket seating area for reliable piping connections.

Compare Class 300 and Class 600 flanges, including pressure rating, temperature derating factors, flange class selection, cost, dimensions, and industrial applications.

Learn whether RF and FF flanges can be mated, why face type mismatch affects gasket compression, and how to choose safer flange connections for industrial piping.

A practical ASME B16.5 guide covering the 2025 latest edition, NPS 1/2 through NPS 24 scope, flange classes, dimensions, materials, markings, testing and differences from ASME B16.42.

A professional weld neck flange guide covering socket weld vs weld neck flange differences, advantages, standards, dimensions, materials, installation and quotation requirements.

Casting vs forging explained for industrial flange buyers: compare grain flow, mechanical properties, defect risks, cost, standards, inspection and application suitability before specifying a flange.

Learn how to pronounce flange correctly, what flange and SO flange mean, how slip-on flanges work, and how to specify the right industrial pipe flange.

A practical guide to ANSI flange dimensions, ANSI flange sizes and flange ratings, including the real meaning of Class 150 and Class 600, standards, materials and selection.

A practical sourcing guide to the Top 5 Pipe Fittings and Flanges Manufacturers, including Songhai Flange, standards, materials, inspection, export support and buyer selection criteria.

GB/T 4334.1-2000: Method of 10% Oxalic Acid Etch Test for Stainless Steels National Standard of the People’s Republic of China ICS 77.040.99 Released: 2000-10-25 Implemented: 2001-09-01 Issued by: State Bureau of Quality and Technical Supervision 1. Scope This standard specifies the specimen, test solution, test equipment, test conditions and procedures, evaluation of test results, and […]

GB/T 6401-1986 Micrographic Method for Determining Area Fraction of α-Phase in Ferritic-Austenitic Duplex Stainless Steels Using Charts Scope This standard specifies the micrographic method for determining the area fraction of the α-phase in ferritic-austenitic duplex stainless steels. 1. Preparation of Test Specimens 1.1 Specimens shall be taken in the delivery condition. The sampling location and […]

GB/T 13305-2008 — Micrographic Method for Determining Area Content of the α-Phases in Stainless Steels Standard Number: GB/T 13305-2008 ICS: 77.040.99 Issued: August 19, 2008 Effective: April 1, 2009 Issuing Authority: Standardization Administration of the People’s Republic of China Replaces: GB/T 13305-1991 and GB/T 6401-1986 Preface This standard replaces GB/T 6401-1986 and GB/T 13305-1991. The […]