Screwed / Threaded Flanges


M-Pipe & Fitting Solution Inc is a reputable company that manufactures and supplies high-quality screwed / threaded flanges. Screwed / Threaded flanges are essential in piping systems, providing a secure connection between pipes or valves. 

Screwed / Threaded Flanges: Screwed / threaded flanges have internal threads to enable easy installation and secure connection with matching external threads on pipes or valves. They are widely used in piping systems where regular disassembly and reassembly is required. The threading allows easy maintenance, adjustment, and replacement without welding or specialized tools. Screwed / threaded flanges are available in various materials, including stainless steel, carbon steel, and duplex steel, each offering distinct advantages and being suitable for different environments and applications.

Stainless Steel Threaded Flanges: Stainless steel threaded flanges are highly popular in industries that require corrosion resistance and excellent mechanical properties. Stainless steel, known for its high chromium content, provides exceptional rust, oxidation, and staining resistance. It is also resistant to high temperatures and chemicals, making it suitable for applications in harsh environments such as chemical processing, oil and gas, and food processing. Stainless steel threaded flanges are available in different grades, including 304, 316, and 316L, each offering specific benefits depending on the application requirements.

Carbon Steel Threaded Flanges: Carbon steel threaded flanges are known for their durability and strength. They are commonly used in industries such as oil and gas, power generation, and petrochemicals, where high pressure and temperature conditions are prevalent. Carbon steel threaded flanges exhibit excellent tensile strength and resistance to impact, making them suitable for heavy-duty applications. They are available in different grades, including ASTM A105 and ASTM A350 LF2, which offer varying levels of strength and impact resistance.

Duplex Steel Threaded Flanges: Duplex steel threaded flanges are a popular choice in industries requiring high strength and corrosion resistance. Duplex steel is a ferritic-austenitic stainless steel alloy that offers excellent resistance to stress corrosion cracking, pitting, and crevice corrosion. It makes it ideal for applications in marine environments, chemical processing plants, and offshore oil and gas platforms. Duplex steel threaded flanges are available in different grades, such as UNS S31803 and UNS S32205, offering a balance of strength, corrosion resistance, and cost-effectiveness.

Stainless Steel Screwed Flanges, Carbon Steel Screwed Flanges, and Duplex Steel Screwed Flanges: Stainless steel, carbon steel, and duplex steel screwed flanges share similar characteristics to their threaded counterparts but offer the added advantage of more straightforward installation. Screwed flanges feature external threads, eliminating the need for pipe threading or welding. It makes them suitable for applications where quick assembly and disassembly are required. Stainless steel screwed flanges, carbon steel screwed flanges, and duplex steel screwed flanges offer the same benefits as their threaded counterparts, including corrosion resistance, durability, and strength.

In conclusion, screwed/threaded flanges, including stainless steel, carbon steel, and duplex steel varieties, play a crucial role in piping systems, providing secure connections and facilitating easy maintenance. Stainless steel threaded flanges offer excellent corrosion resistance, carbon steel threaded flanges provide durability and strength, and duplex steel threaded flanges combine high strength with corrosion resistance. Additionally, stainless steel screwed flanges, carbon steel screwed flanges, and duplex steel screwed flanges offer the advantage of easy installation without the need for additional threading or welding. Understanding the properties and applications of these flanges allows engineers, contractors, and industry professionals to make informed decisions when selecting the most suitable option for their specific requirements. M-Pipe & Fitting Solution Inc provides certified flanges that meet international standards such as API, ASTM, and ISO 9001:2015.

ASME B16.5 Threaded Flange/ Screwed Flange Size Chart1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Threaded Flange/ Screwed Flange StandardsANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Threaded Flange/ Screwed Flange, ASME Threaded Flange/ Screwed Flange, BS Threaded Flange/ Screwed Flange, DIN Threaded Flange/ Screwed Flange, EN Threaded Flange/ Screwed Flange, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092
Pipe Size



Outside Diameter of Flange



Diameter of Raised Face



Thickness of Flange



Diameter of Hub at Base



Length of Hub



Minimum Thread Length



Number of Bolt HolesApprox. Weight



1/23 1/21 3/87/161 3/165/85/842
3/43 7/81 11/161/21 1/25/85/842
14 1/429/161 15/1611/1611/1642
1 1/44 5/82 1/25/82 5/1613/1613/1643
1 1/252 7/811/162 9/167/87/843
263 5/83/43 7/161145
2 1/274 1/87/83 9/161 1/81 1/847
37 1/2515/164 1/41 3/161 3/1648
3 1/28 1/25 1/215/164 13/161 1/41 1/4811
496 3/1615/165 5/161 5/161 5/16813
5107 5/1615/166 7/161 7/161 7/16815
6118 1/217 9/161 9/161 9/16819
813 1/210 5/81 1/89 11/161 3/41 3/4830
101612 3/41 3/16121 15/161 15/161243
1219151 1/414 3/82 3/162 3/161264
142116 1/41 3/815 3/42 1/42 1/41285
1623 1/218 1/21 7/16182 1/22 1/21693
1825211 9/1619 7/82 11/162 11/1616120
2027 1/2231 11/16222 7/82 7/820155
2229 1/225 1/41 13/16243 1/83 1/820159
243227 1/41 7/826 1/83 1/43 1/420210

All information in our datasheet is grounded on approximate testing and is stated formal of our knowledge & belief.  It’s presented piecemeal from contractual scores and doesn’t constitute any guarantee of properties or of processing or operation possibilities in individual cases. Our guarantees and arrears are stated simply in our terms of trade.