ASTM A182 F316/L ANSI B16.5 WN RF Class 300 Stainless Steel Weld Neck Raised Face Flange

Stainless Steel Pipe Flanges Information

A stainless steel weld neck raised face flange is a type of flange commonly used in high-pressure piping systems.

The weld neck raised face flange has a circular shape with a long tapered hub and a neck that extends from the flange body. The neck is designed to match the pipe's inside diameter and provides reinforcement to the connection. The raised face surface provides a sealing area for the gasket.

The weld neck flange is welded to the pipe by fillet welding both on the inside and outside of the flange. The butt weld joint between the neck and the pipe provides a strong and leak-resistant connection.

Stainless Steel Pipe Flanges Materials: ASTM A182 F316/F316L

Stainless steel weld neck raised face flanges are commonly made from austenitic stainless steel grades such as 304 (UNS S30400) and 316 (UNS S31600). These grades offer excellent corrosion resistance and mechanical properties suitable for various applications.

Stainless steel 316/ 316L flanges have enhanced resistance to pitting corrosion in chloride environments due to the addition of molybdenum. The letter “L” denotes low carbon content. According to ASME B16.5 and ASME B16.47, SS 316/ 316L flanges may be made from forgings of ASTM A182 Grade F316 or F316L, castings of ASTM A351 Grades CF8M or CF3M, and plates of ASTM A240 Grades 316 or 316L.

ASTM A182 F316/F316L Chemical Composition (%)

ASTM A182 F316/F316L Mechanical Properties

Flange Type:Weld Neck Flange (WN)

A weld neck flange, also called a tapered hub flange or high-hub flange, is a kind of flange that can relocate stress to the pipes, ensuring a decrease in high-stress concentration at the bottom of the flange. There are two welding neck flanges designs – the first type is used with pipes while the second, longer type cannot be used with pipes but with a process plant. The weld neck flange comprises of a round fitting that extends beyond the rim of the circumference. These flanges, typically manufactured from forging, are actually welded to pipes.

Face Type: Raised Face (RF)

The Raised Face flange is the most common type used in process plant applications, and is easily to identify. It is referred to as a raised face because the gasket surfaces are raised above the bolting circle face. This face type allows the use of a wide combination of gasket designs, including flat ring sheet types and metallic composites such as spiral wound and double jacketed types.

The purpose of a RF flange is to concentrate more pressure on a smaller gasket area and thereby increase the pressure containment capability of the joint. Diameter and height are in ASME B16.5 defined, by pressure class and diameter. Pressure rating of the flange determines the height of the raised face.

ANSI B16.5 Flange Dimensions – Class 300 (mm)

Kasugai Shanghai, a subsidiary of Kasugai Group headquartered in Osaka, Japan, was established in 2003 as a representative office in Shanghai, China, and was upgraded to a company in 2008. Kasugai Shanghai serves as an important force of Kasugai Group in Asia, and over the past 20 years, it has become a key player in the industrial pipes, fittings, flanges, and valves market.

Kasugai Shanghai leverages the resources and manufacturing capabilities of local suppliers in China to provide a wide range of products, including stainless steel, carbon steel, duplex/super duplex steel, alloy steel, nickel alloy, and titanium alloy, according to various international standards such as ASTM/ASME/ANSI, JIS, EN, and DIN. The company also has a local support team and an on-site quality inspection team to ensure that products meet the specifications and quality requirements of customers.

With the support of high-quality local suppliers and a strong commitment to customer satisfaction, Kasugai Shanghai strives to provide reliable products and services to customers in Asia and beyond. Kasugai Group's establishment of Kasugai Shanghai and other international operations demonstrates their proactive approach to globalization and their commitment to meeting the needs of customers in a rapidly changing global market.

Kasugai Group Company Profile:

Foundation : June, 1925

Legal Representative : Akinori Kasugai

Number of employees : 140 persons (150 persons including employees of the affiliates) As of March 21, 2023

Scope of business : wholesaler and trade firm of industrial pipe/tube, fittings, flanges and valves

Kasugai Group Locations:

Head Office

4-14-2 Shinmachi, Nishi-ku, Osaka 5500013, Japan

TEL: 81-6-6538-7281

FAX: 81-6-6538-2273

E-MAIL: contact@kasugai-group.co.jp

Shanghai

Rm. A8415 Building A8, No. 808 Hongqiao Road, Xuhui District, Shanghai 200030, China.

TEL: 86-21-6447-1967

FAX: 86-21 6447-7841

E-MAIL: zhanghb@kasugai-group-co.jp

Other Branch Offices and Joint Ventures:

Fukuoka, Kitakyushu, Tokai, Kyoto, Shunan, Tokyo, USA (Watchung, N.J.), Jiangyin (Jiangsu, China)

Our Strengths:

Since our foundation in 1925, we have continuously taken steps to further grow our businesses. Global capabilities, professionalism, and trust. These three strengths are the reason that customers continue to choose Kasugai, regardless of the period.

-Global capabilities

We embarked on overseas procurement ahead of our competitors in the industry and have established a supplier network that can meet a variety of market demands. We are successfully chosen by many overseas customers
as a global procurement partner.

- Professionalism

Leveraging expertise cultivated over many years, we deliver optimal products to the optimal place at the optimal time. Our excellent information gathering and problem-solving abilities are also invaluable for solving customer issues.

- Trust

We provide smooth, prompt services by cultivating solid relationships of trust with suppliers. We believe that building stronger partnerships is the source of our growth.