HVAC Industry
1,500+ Customers Across US, CAN, and MEX Flanges & Custom Parts For The HVAC Industry Whether you’re seeking superior steel flanges for robust connections or innovative expansion joints for optimal system flexibility, API International has you covered. Shop Flanges OUR ROLE IN THE HVAC INDUSTRY API International is your premier partner in providing top-notch industrial […]
Marine Industry
1,500+ Customers Across US, CAN, and MEX Flanges & Custom Parts For The Marine Industry Whether you’re seeking corrosion-resistant steel flanges, flexible expansion joints to withstand harsh maritime conditions or custom machined solutions for specific vessel needs, API International has you covered. Shop Flanges OUR ROLE IN THE Marine INDUSTRY API International is your source […]
Agriculture Industry
1,500+ Customers Across US, CAN, and MEX Flanges & Products For The Agriculture Industry With a deep understanding of the agriculture sector’s unique demands, we deliver reliable, high-performance fittings that enhance efficiency, durability, and productivity. Shop Flanges OUR ROLE IN THE agriculture INDUSTRY API International is your premier choice for top-quality industrial wholesale fittings tailored […]
Waterworks Industry
1,500+ Customers Across US, CAN, and MEX Flanges For The Waterworks Industry With a commitment to exceptional quality and unparalleled customer service, API International stands at the forefront of delivering reliable solutions that ensure fluid operation, optimal efficiency, and environmental sustainability for water treatment and wastewater management processes. Shop Flanges OUR ROLE IN THE waterworks […]
Exhaust Industry
1,500+ Customers Across US, CAN, and MEX Flanges & Custom Parts For The Exhaust Industry Our expert team combines years of experience with cutting-edge technology to deliver solutions that exceed expectations. Whether you’re looking for precision-engineered parts or specialized components, our comprehensive range and dedication to customer satisfaction make us a leading supplier. Shop Flanges […]
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Terms and Conditions
Standard Terms and Conditions of Sale UNLESS OTHERWISE AGREED TO IN WRITING, THE FOLLOWING PROVISIONS APPLY TO ALL SALES: 1) SALES: All merchandise ordered shall be sold subject to SELLER’S standard warranty, viz: SELLER warrants that any product of its manufacture, which upon examination is found by SELLER’S representative to be defective either in the […]
Product Catalog
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Flange Dimensional Tolerances
This table displays Flange Dimensional Tolerances by inside, outside, and contact diameter, thickness, and drilling tolerances for bolt holes diameter and spacing. These standard flange dimensional tolerances are ideal when other specifications aren’t used. OUTSIDE DIAMETER When O.D. is 24″ or less +0.125″ , -0.0625″ When O.D. over is 24″ +0.125″ , -0.125″ INSIDE DIAMETER […]