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Custom Machining & Manufacturing

Our machine shop enables API to manufacture custom flanges and other products that meet a wide variety of specifications that utilize AIS, import, and exotic materials. We also support fast turn modifications to our stock items in order to meet customer needs. Whether you have a CAD drawing or sample that needs to be reverse engineered, we can work with you on prototyping, production quantity manufacturing and even warehousing product.

Our Advantage

Range of Capabilities

Experience with a wide variety of products, sizes, materials and specifications.

Quick Turnaround

Short lead times that allow you to get products to customers when they need them.

Quality Control

QC personnel work with modern technology to verify that all of our products meet your project requirements and abide by current regulations.

Cost Reduction

Our machine shop’s vast knowledge of tooling and fixturing can help reduce your production cost, especially on your high volume products.

Learn more about our Machine Shop!

Our Advantage


  • Variety of 3-axis vertical mills allows efficient machining of your part
  • Open work envelope of 4-axis horizontal Boring Mill allows machining of parts up to 59”(X) x 39”(Y) x 29”(Z) in size, with the ability to work with larger parts by repositioning


  • Versatile array of lathes can handle your small to medium size parts
  • Two CNC lathes with the ability to turn parts with diameters from 3” to 43”
  • Selection of manual lathes supports a turning range of 3” to 108” (118” when ID >= 24“)
milling a custom flange
machining a custom flange


*Tooling can be added quickly in order to work with almost any material

  • Carbon Steel
  • Stainless Steel
  • Aluminum
  • Duplex
  • Super Duplex
  • Alloy 20


Part Size (max) Tolerance (inches)
21″ ± 0.001
42″ ± 0.010
60″ ± 0.031
118″ ± 0.063

Helpful Details

Our Machines

Here are some of the machines that allow us to manufacture custom flanges and other fittings. They can make modifications to standard parts, like overboring, counterboring, different bolt holes and surface finishes.

Doosan Mynx 7500/50 - CNC Mill
63" x 30" work envelope
Ideal for: Larger parts and exotic materials
Doosan DNM 5700 - CNC Mill
40" x 20" work envelope
Ideal for: High speed milling of material such as aluminum and plastic
Hyundai Wia LV1100R - Vertical CNC Lathe
Maximum turning diameter: 39"
Ideal for: High volume turning of complex parts up to 39" diameters
Doosan Mynx 5400/50 - CNC Mill
40" x 20" work envelope
Ideal for: Precision drilling & milling
Bullard Dynatrol - Vertical Turret Lathe
Maximum turning diameter: 108"
Ideal for: Turning rings and flanges with 42" to 108" outer diameters
Monarch 96
Drill holes 0.25" - 3" diameter
Work piece: 20" - 108" diameter
Ideal for: Drilling bolt holes
QUICKDRILL - Gantry Machining Center - CNC Mill
Work Envelope: 120" x 120" inches
Ideal for: Drilling and milling large flanges 8"in. thick & up to 18'ft. in diameter.
Ikegai NB11T - Horizontal CNC Mill
Horizontal milling with 59" x 39" work envelope
Ideal for: Multi-axis milling and boring
Doosan Puma 480 - Horizontal CNC Lathe
Maximum turning diameter: 21.5"
Maximum length of work: 39"
Ideal for: High volume turning of complex parts
Senfeng SF1500HC – Fiber Laser Cleaner
Ideal for: Rust removal, paint removal, grease removal, weld cleaning
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