# API International, Inc\.: Industrial Manufacturer \& Wholesale Distributor
> API International manufactures standard \& custom steel flanges to meet the highest quality standards \| AWWA \& ANSI/ASME \| Domestic \(AIS\) and imported material
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## Pages
- [Custom Machining](https://apiint.com/custom-machining/)
- [Terms and Conditions](https://apiint.com/terms-and-conditions/)
- [FAQ Page](https://apiint.com/flange-faq/)
- [ANSI/ASME B16\.47 Series A Flange Dimensions](https://apiint.com/flange-dimensions/ansi-asme-b16-47-series-a/)
- [ANSI/ASME B16\.47 Series A Class 150 Flange Dimensions](https://apiint.com/flange-dimensions/ansi-asme-b16-47-series-a/class-150-series-a/)
## Posts
- [What Are Carbon Steel Flanges?](https://apiint.com/blog/what-are-carbon-steel-flanges/)
- [What Are Carbon Steel Flanges Used For?](https://apiint.com/blog/what-are-carbon-steel-flanges-used-for/)
- [Carbon Steel Flange Types](https://apiint.com/blog/carbon-steel-flange-types/)
- [Carbon Steel Flange Specifications: Standards and Pressure Ratings](https://apiint.com/blog/carbon-steel-flange-specifications/)
- [Why Choose Plate Flanges?](https://apiint.com/blog/why-choose-plate-flanges/)
## Products
- [Round Exhaust Stainless Steel Flanges](https://apiint.com/product/round-exhaust-stainless-steel-flanges/): Round Exhaust Stainless Steel Flanges are available in 304L and 316L stainless steel, offering excellent corrosion resistance\. The material used for these exhaust flanges meets AWWA C228 specifications and is suitable for high\-temperature applications\.
\
\Caterpillar Exhaust Flanges\
\Cummins Exhaust Flanges\
\Detroit Exhaust Flanges\
\
- [KLAMPz K58 Pipe Adapter Nipples](https://apiint.com/product/klampz-k58-pipe-adapter-nipples/): KLAMPz K58 Adapter Nipples meet American Water Works Association \(AWWA\) and ANSI C606\-06 specifications and the steel pipe material meets ASTM A53 Grade B Schedule 40 standards\. Find the nominal pipe size, range of groove diameters, and wall thicknesses to suit your application needs\.
- [KLAMPz SK58 Stainless Steel Pipe Adapter Nipples](https://apiint.com/product/klampz-sk58-stainless-steel-pipe-adapter-nipples/): KLAMPz SK58 Adapter Nipples meet American Water Works Association \(AWWA\) and ANSI C606 specifications, stainless \steel class follows ASME B36\.19, \and the stainless steel pipe material meets ASTM A312 \(304, 304L, 316, 316L\) Schedule 40 standards\. Find the nominal pipe size, range of groove diameters, and wall thicknesses to suit your application needs\.
- [5/8\-Inch Thick Steel Slip\-On Flanges](https://apiint.com/product/5-8-inch-thick-steel-slip-on-flanges/): Class 150 Steel Slip\-On Plate Flanges meet AWWA C207 and ANSI \#150 bolt pattern specifications\. This flange type can be manufactured in additional grades of steel if necessary\.
- [Gaskets](https://apiint.com/product/gaskets/): We supply top\-quality gaskets in materials including Red Rubber and Green Non\-Asbestos for superior performance\. Find the gaskets and accessories necessary in standard and compound materials\-1/16\-inch and 1/8\-inch, with other thicknesses available\.
\\Technical Data Sheet For Gaskets\\
## 3D FlipBook
- [Product Catalog](https://apiint.com/blog/3d-flip-book/fittings-catalog/)
## Categories
- [Uncategorized](https://apiint.com/blog/category/uncategorized/)
- [Blog Posts](https://apiint.com/blog/category/blog/)
- [Press Releases](https://apiint.com/blog/category/press-releases/)
- [Flanges](https://apiint.com/blog/category/flanges/)
## Tags
- [flange material](https://apiint.com/blog/tag/flange-material/)
- [Stainless Steel Flanges](https://apiint.com/blog/tag/stainless-steel-flanges/)
- [custom flanges](https://apiint.com/blog/tag/custom-flanges/)
- [Press Release](https://apiint.com/blog/tag/press-release/)
- [AWWA C207](https://apiint.com/blog/tag/awwa-c207/)
## Associations
- [AWWA C207](https://apiint.com/blog/association/awwa-c207/)
- [AWWA C228](https://apiint.com/blog/association/awwa-c228/)
- [Lightweight \(1/2"\)](https://apiint.com/blog/association/lightweight-1-2/)
- [Lightweight \(5/8"\)](https://apiint.com/blog/association/lightweight-5-8/)
- [Exhaust](https://apiint.com/blog/association/exhaust/)
## Classes
- [B](https://apiint.com/blog/class/b/)
- [D](https://apiint.com/blog/class/d/)
- [E](https://apiint.com/blog/class/e/)
- [F](https://apiint.com/blog/class/f/)
- [A](https://apiint.com/blog/class/a/)
## Faces
- [Flat\-face](https://apiint.com/blog/face/flat-face/)
- [Raised\-face](https://apiint.com/blog/face/raised-face/)
## Manufacturers
- [Catepillar](https://apiint.com/blog/manufacturer/catepillar/)
- [Cummins](https://apiint.com/blog/manufacturer/cummins/)
- [Detroit](https://apiint.com/blog/manufacturer/detroit/)
- [Mitsubishi](https://apiint.com/blog/manufacturer/mitsubishi/)
## Materials
- [Mild Steel](https://apiint.com/blog/material/mild-steel/)
- [Stainless Steel](https://apiint.com/blog/material/stainless-steel/)
- [Ductile Iron](https://apiint.com/blog/material/ductile-iron/)
## Pipe Types
- [IPS](https://apiint.com/blog/pipe-type/ips/)
- [Reducing](https://apiint.com/blog/pipe-type/reducing/)
- [O\.D\. Tube](https://apiint.com/blog/pipe-type/o-d-tube/)
## Styles
- [Twin Sphere](https://apiint.com/blog/style/twin-sphere/)
- [Single Sphere](https://apiint.com/blog/style/single-sphere/)
## Types
- [Valve Extensions](https://apiint.com/blog/flange-type/valve-extensions/)
- [Miscellaneous](https://apiint.com/blog/flange-type/miscellaneous/)
- [Pipe Nipples](https://apiint.com/blog/flange-type/pipe-nipples/)
- [Rain Caps](https://apiint.com/blog/flange-type/rain-caps/)
- [Stub Ends](https://apiint.com/blog/flange-type/stub-ends/)
## Product categories
- [Miscellaneous Plate Flanges](https://apiint.com/product-category/flanges/plate-flanges/)
- [Overbore Flanges](https://apiint.com/product-category/flanges/overbore-flanges/)
- [ANSI/ASME Forged Flanges](https://apiint.com/product-category/flanges/ansi-style-forged-flanges/)
- [Closeout Products](https://apiint.com/product-category/closeout-products/)
- [Fittings \& Accessories](https://apiint.com/product-category/fittings-accessories/)
## Product tags
- [ULFM](https://apiint.com/product-tag/ulfm/)
- [UL/FM](https://apiint.com/product-tag/ul-fm/)
## Product Amount
- [4 HALVES](https://apiint.com/amount/4-halves/)
- [8 QUARTERS](https://apiint.com/amount/8-quarters/)
## Product ANSI Class
- [300](https://apiint.com/ansi-class/300/)
- [150](https://apiint.com/ansi-class/150/)
- [125](https://apiint.com/ansi-class/125/)
- [250](https://apiint.com/ansi-class/250/)
- [600](https://apiint.com/ansi-class/600/)
## Product Body Material
- [EPDM](https://apiint.com/body-material/epdm/)
- [Neoprene](https://apiint.com/body-material/neoprene/)
- [Buna\-N](https://apiint.com/body-material/buna-n/)
- [Steel](https://apiint.com/body-material/steel/)
- [Aluminum](https://apiint.com/body-material/aluminum/)
## Product Bore
- [IPS Pipe Size](https://apiint.com/bore/ips-pipe-size/)
- [OD Tube Size](https://apiint.com/bore/od-tube-size/)
- [Overbore](https://apiint.com/bore/overbore/)
## Product Braid Type
- [Single Standard Braid](https://apiint.com/braid-type/single-standard-braid/)
- [Single Braided Braid](https://apiint.com/braid-type/single-braided-braid/)
## Product Drilling Pattern
- [150\#](https://apiint.com/drilling-pattern/150_/)
- [300\#](https://apiint.com/drilling-pattern/300_/)
- [PN16](https://apiint.com/drilling-pattern/pn16/)
- [PN10](https://apiint.com/drilling-pattern/pn10/)
- [\#150](https://apiint.com/drilling-pattern/_150/)
## Product Flange Material
- [304L Stainless Steel](https://apiint.com/flange-material/304l-stainless-steel/)
- [316L Stainless Steel](https://apiint.com/flange-material/316l-stainless-steel/)
## Product Inner Diameter Size
- [54 \(55\.88 OB\) CLASS D](https://apiint.com/inner-diameter-size/54-55-88-ob-class-d/)
- [48 \(50 OB\) CLASS F](https://apiint.com/inner-diameter-size/48-50-ob-class-f/)
- [42 \(44 OB\) CLASS F](https://apiint.com/inner-diameter-size/42-44-ob-class-f/)
- [36 \(38 OB\) CLASS F](https://apiint.com/inner-diameter-size/36-38-ob-class-f/)
- [30 \(32 OB\) CLASS F](https://apiint.com/inner-diameter-size/30-32-ob-class-f/)
## Product Length
- [4](https://apiint.com/length/4/)
- [3](https://apiint.com/length/3/)
- [2](https://apiint.com/length/2/)
- [1\.5](https://apiint.com/length/1-5/)
- [4\.5](https://apiint.com/length/4-5/)
## Product Material
- [304L Stainless Steel](https://apiint.com/material/304l-stainless-steel/)
- [316L Stainless Steel](https://apiint.com/material/316l-stainless-steel/)
- [304 Stainless Steel](https://apiint.com/material/304-stainless-steel/)
- [Mild Steel](https://apiint.com/material/mild-steel/)
- [A105 Steel](https://apiint.com/material/a105-steel/)
## Product Nominal Size
- [5](https://apiint.com/nominal-size/5/)
- [6](https://apiint.com/nominal-size/6/)
- [12](https://apiint.com/nominal-size/12/)
- [8](https://apiint.com/nominal-size/8/)
- [10](https://apiint.com/nominal-size/10/)
## Product Nominal Size \(Inches\)
- [6](https://apiint.com/nominal-size-inches/6/)
- [4](https://apiint.com/nominal-size-inches/4/)
- [18](https://apiint.com/nominal-size-inches/18/)
- [8](https://apiint.com/nominal-size-inches/8/)
- [30](https://apiint.com/nominal-size-inches/30/)
## Product Origin
- [Import](https://apiint.com/origin/import/)
- [Domestic \(AIS\)](https://apiint.com/origin/domestic-ais/)
- [Domestic](https://apiint.com/origin/domestic/)
## Product Pressure Rating
- [Heavy Spring](https://apiint.com/pressure-rating/heavy-spring/)
- [Standard Spring](https://apiint.com/pressure-rating/standard-spring/)
- [Light Spring](https://apiint.com/pressure-rating/light-spring/)
## Product Pressure Rating \(LBS\.\)
- [150 lbs\.](https://apiint.com/pressure-rating-lbs/150-lbs/)
- [125 lbs\.](https://apiint.com/pressure-rating-lbs/125-lbs/)
## Product Pressure Setting
- [110](https://apiint.com/pressure-setting/110/)
- [60](https://apiint.com/pressure-setting/60/)
- [40](https://apiint.com/pressure-setting/40/)
- [80](https://apiint.com/pressure-setting/80/)
- [75](https://apiint.com/pressure-setting/75/)
## Product Size
- [6](https://apiint.com/size/6/)
- [4](https://apiint.com/size/4/)
- [8](https://apiint.com/size/8/)
- [12](https://apiint.com/size/12/)
- [5](https://apiint.com/size/5/)
## Product Size \(Inches\)
- [30](https://apiint.com/size-inches/30/)
- [36](https://apiint.com/size-inches/36/)
- [20](https://apiint.com/size-inches/20/)
- [18](https://apiint.com/size-inches/18/)
- [14](https://apiint.com/size-inches/14/)
## Product Type
- [CAT](https://apiint.com/type-2/cat/)
- [Cummins](https://apiint.com/type-2/cummins/)
- [Detroit](https://apiint.com/type-2/detroit/)
- [Twin](https://apiint.com/type-2/twin/)
- [Single](https://apiint.com/type-2/single/)
## Product UL/FM Certification
- [UL/FM\-Approved](https://apiint.com/ul-fm-certification/ul-fm-approved/)
- [Non\-UL/FM](https://apiint.com/ul-fm-certification/non-ul-fm/)
## Levels
- [Silver](https://apiint.com/blog/level/silver/)
- [Bronze](https://apiint.com/blog/level/bronze/)
## Optional
- [Sitemap index](https://apiint.com/sitemap_index.xml)