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This section provides an overview for flange screws as well as their applications and principles. Also, please take a look at the list of 9 flange screw manufacturers and their company rankings. Here are the top-ranked flange screw companies as of December, 2024: 1.H&W Manufacturing., 2.Creative Fasteners, 3.Kalpataru Corporation.
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1985-2014: Worked for Alstom Corporation, ABB Corporation, and Gadelius Corporation, designing Jungstrom air preheaters and mechanical design of diamond soot blowers. (ABB Corporation: https://new.abb.com/jp)
2014-2021: Worked as an engineering and project manager at Alvos Inc.
https://www.linkedin.com/in/yoichi-hiroki-92192394/
A threaded flange is a type of threaded joint used in piping, in which the connection method between the flange and the pipe (pipe) is a threaded type.
A Flange Screwed Flange has a female tapered pipe thread on the inside diameter of the flange, and is connected to a pipe end with a male tapered pipe thread by threading it.
The taper pipe thread is defined in JIS B0203 as "a thread whose main purpose is to ensure tightness of the threaded portion when joining piping, piping components, fluid equipment, etc.".
Figure 1. Example of screwed flange use
Flange Screws are used for air piping where the fluid pressure and temperature are not very high and leakage of a certain amount of fluid is not dangerous. Unlike other connection methods (welding, loose joint, etc.), the use of threaded flanges is limited.
When a Flange Screw is used and a leak occurs, it is necessary to remove the pipe, rewrap the sealing tape, and retighten it. In many cases, this type of flange is used when the piping and flange must be easy to install and remove.
In addition, the connection method between the piping and the flange is threaded, which can be used when welding or other fireproofing cannot be used on site. In selecting Flange Screws, the material, pressure resistance, size, etc. are selected based on the type of fluid, pressure, temperature, flow rate, etc.
Figure 2. Principle of screwed flange
The principle of a Flange Screw is exactly the same as that of an ordinary piping flange, and the flange surfaces to be connected are sealed by making them adhere to each other.
The screw standards used are as follows
Flange Screws are used when the pressure and temperature of the fluid to be used are limited so that leaks are not hazardous in the unlikely event that they occur. When screwing in piping, sealing tape or similar material can be wrapped around the male threads of the piping to improve the sealing performance of the installation.
Flange Screws, like normal pipe flanges, require bolts and nuts for flange fastening to be evenly tightened. Uneven tightening may result in leakage. For this reason, it is common practice to tighten bolts and nuts diagonally, rather than in the order of their sequence.
It is also important to tighten the bolts and nuts at the specified torque value for the gasket material and bolt/nut. Tighten the bolts and nuts in diagonal order, gradually increasing the tightening torque until the required tightening torque value is reached. When used with high-temperature fluid, the tightening of the threads may loosen due to thermal expansion after the actual flow of high-temperature fluid, in which case the bolts and nuts need to be retightened.
Figure 3. Example of JIS B2220/B2239 screwed flange
There are various standards for flanges, such as JIS, JPI, ASME/ANSI, etc. Typical examples are as follows.
In "JIS B2220 Steel Pipe Flanges," nominal pressure ranges from 5K to 63K, but Flange Screws are applied to nominal pressures of 5K, 10K, 16K, and 20K. In "JPI-7S-15-2011 Flanges for the Petroleum Industry" and "ASME/ANSI B16.5 Pipe Flange and Flanged Fittings", the flanges are applied to nominal pressure classes 150, 300, 600, 900, 1500 and 2500.
The following is an example of JIS standard flange specifications.
Typical flange materials in JIS standards are as follows
Low Alloy Steel
Flanges are used in pairs, and both flanges must be made of the same material. The selection of flange material is indicated in each standard; in the JIS standard, "nominal pressure" and "material group number" are selected according to the "maximum working pressure" and "fluid temperature" of the working fluid flowing in the pipe.
It is important to select materials from several standard materials classified by material group number according to the flange manufacturing method, operating environment, cost, and other factors.
*Including some distributors, etc.
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H&W Manufacturing., founded in Spring, Texas in 1978, is a precision machine shop that specializes in machining customized components. The company's product and service portfolio includes CNC machines that are capable of manufacturing complex components with unparalleled precision for materials, including metals, plastics, and composites, Custom Tooling and Fixturing and machining capabilities such as Swiss Screw Machining, CNC Milling and CNC Turning. It also provides turnkey solutions including Assembly and parts kitting, Gun drilling, and Heat treating.
Kalpataru Corporation, founded in Mumbai, Maharashtra in 2009, is a manufacturer of Phillips Screws, Mild Steel Washer, MS Nut, MS Bolt, and MS Fasteners. The company manufactures stainless steel fasteners including socket head Allen cap screws, ss cheese head screws, captive panel fasteners, and stainless steel lock nuts from Mumbai. it also has design and quality testing departments and offers services such as prototyping, customer support, custom manufacturing, and delivery.
Shenzhen Heat Hardware Co. Ltd, founded in the year 2003, and based in Shenzhen City, China, is a manufacturer and supplier of screws, bolts, and fasteners. Their product portfolio includes a diverse range of screws, bolts, and fasteners. The company offers one-stop customized solutions of screws, custom bolts, and fasteners for producing, designing, supplying, and exporting. The company is ISO-certified for environmentally friendly products. The products are used in various industries which include automotive, electronic, electric, communication, medical, and military projects.
ACube Fasteners Pune is a manufacturer of screws, bolts and special critical fasteners. Established in 2012, the company is based and headquartered in Pimpri-Chinchwad, Maharashtra, India. The company, an ISO 9001-2015 company, specializes in designing and producing many types of screws and fasteners for various applications. Its product range includes special screws and bolts, machine and hex screws, special and weld screws, self-tapping screws and rivets, serving industries such as construction, manufacturing, and automotive. ACube Fasteners offers services like customized fastener solutions and technical support.
CREST PRECISION SCREWS PVT. LTD., founded in Maharashtra, India in 1993, is a manufacturer of High Tensile Fasteners for all kinds of segments like windmills, Construction, Hydropower, and Engineering industries. The company's product portfolio includes Hexagon Socket Head Shoulder Screws, Hexagon Socket Countersunk head Screws, Heavy Hex Bolts-for High Strength Structural Bolting, Spring Washers, and Machine Screws and the products are AN ISO9001:2015; ISO14001:2015; ISO45001:2018 certified. The company also offers Inventory Management and Engineering Services as well as technical support.
Fareast Metal International Co.Ltd., founded in Taiwan in 1993, is a manufacturer of flange bolts and 12 points. The company's product portfolio includes a wide range of flange bolts designed to meet diverse application requirements in various sizes, materials, and finishes, ensuring compatibility with a wide array of projects, screws, and other specialty bolts. The company has ISO 9002, CNLA, and A2LA certifications and operations in Taiwan and the United States of America.
Creative Fasteners is an Indian manufacturer of various fasteners founded in 2010 and based in Vasai, Maharashtra. The company produces a wide range of standard and non-standard fasteners including solid and semi-tubular rivets, bolts, grub screws, and washers. These are made from various materials, such as stainless steel, brass, copper, and aluminum. It also offers precision turned and sheet metal components, as well as fasteners tailored to customer specifications. Creative Fasteners primarily serves clients in the automobile, machine manufacturing, furniture, and home appliance industries.
Ananka Group is a fastener manufacturer established in Mumbai, India. While being specialized in inconel, monel and incoloy fasteners, the company has multiple other items in its catalogue, including flanges and rods. Its products are available for shipping to more than 90 countries, and are part of projects in the aerospace, food, automotive, marine, railway and paper industries alike. The company holds multiple certificates, such as ISO 9001:2015 and ISO 14001:2015. In addition, it also displays a weight chart of their products available to users on its website.
Haiyan Longcheng Standard Parts Co. Ltd., founded in China, is a manufacturer of Square Head Wood Screw With Turning Suppliers. The company's product portfolio includes Stainless steel U-bolts-bolt, Hexagonal wood screws, Stainless steel screws, Non-standard screws, and Hexagonal flange screws. The company's factory has an annual export volume of up to 10,000 tons, which can produce Chinese GB standard, German DIN standard, international ISO standard, and British standard. National BS.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | H&W Manufacturing. |
33.3%
|
| 2 | Creative Fasteners |
22.2%
|
| 3 | Kalpataru Corporation |
11.1%
|
| 4 | CREST PRECISION SCREWS PVT. LTD. |
11.1%
|
| 5 | Ananka Group |
11.1%
|
| 6 | ACube Fasteners Pune |
11.1%
|
Derivation Method
The ranking is calculated based on the click share within the flange screw page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
India
|
3 | 42.9% |
|
China
|
2 | 28.6% |
|
United States of America
|
1 | 14.3% |
|
Taiwan
|
1 | 14.3% |
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