Customized design: Personalized production can be carried out based on customer provided drawings and parameters (such as pressure, temperature, medium) to meet special working conditions.

Diverse materials: Supports the use of stainless steel such as 304, 316L, 321, as well as carbon steel, alloy steel, nickel based alloys (such as Inconel 625), etc., to adapt to corrosive, high temperature, and high pressure environments.

Advanced technology: using forging, slitting processing, CNC precision machining and other technologies to ensure product strength and accuracy, with an annual production capacity of over 2000 tons.

Widely applicable: Suitable for complex pipeline systems in industries such as petroleum, chemical, pharmaceutical, pressure vessel, shipbuilding, and food.

Quality assurance: Passed ISO9001:2000 quality management system certification, and some manufacturers provide EN 10204 3.1 material certification documents.

Non standard flanges are flanges customized according to specific equipment or engineering requirements, which do not fully follow the universal dimensions of national or international standards, and have the characteristics of high customization and strong adaptability.

Hongguan non-standard flange optional material

mainIncluding austenitestainless steel、Dual phase steel, titanium alloyHastelloy, Monel, Inconel, and customized special metals.

Sealing surface form, non-standard flanges can be customized with multiple sealing surfaces as needed to match different sealing requirements:

Flat (FF): Suitable for low-pressure systems, commonly used for matching cast iron flanges.

RF (RF): The most common type, which enhances the clamping force of the gasket and is suitable for medium voltage applications.

Concave convex surface (MFM): prevents the gasket from being squeezed out, suitable for high pressure and easily leaking media.

Mortise and tenon surface (TG): Excellent sealing performance, used in flammable, explosive or toxic medium systems.

Ring Connection Surface (RJ): Metal ring gaskets are used to achieve line sealing, suitable for high temperature and high pressure conditions, such as deep-sea oil and gas pipelines.

execution standard

Although it is "non-standard", it can still be designed and tested according to mainstream standard systems:

Chinese standards: GB/T 9112-2010, HG20592-2009, JB/T 79-94, etc.

American standards: ANSI B16.5, ASME B16.5 (Class series).

German standards: DIN2573, DIN2576, etc.

Japanese standards: JIS 5K, 10K, 16K, etc.

Note: Although non-standard flanges do not fully comply with the above standard dimensions, their pressure rating, sealing surface definition, or material specifications are often referenced as design basis.

Dimensions‌

‌公称直径（DN）‌：范围广，从 ‌DN10 至 DN6000（240″）‌ 不等。

‌外径范围‌：‌75mm–2190mm‌，螺栓孔中心圆直径 ‌50mm–2130mm‌。

‌螺栓配置‌：螺栓孔数量 ‌4–48个‌，直径 ‌11–30mm‌，螺纹规格 M10–M27。

‌法兰厚度‌：‌12–58mm‌，高压或大口径法兰可更厚以增强承压能力。

pressure rating‌

‌PN体系（欧洲/中国）‌：覆盖 ‌PN0.25 至 PN42.0‌（约 0.6–32 MPa）。

‌Class体系（美洲）‌：支持 ‌Class150 至 Class2500‌，适用于超高压场景（如CL1500）。

‌Lb单位‌：常见 ‌150Lb–2500Lb‌，对应不同温度下的最大允许工作压力。