How long have we been in business?

FOURINOX was originally established as Fourcorp in 1974. During the purchase of the company in 2004, the name was changed to reflect our specialty. INOX is a Latin derivation of the work Inoxible, which means stainless. Our specialty is in stainless and high alloy fabrications and the name was changed to reflect that core strength.

What materials do we manufacture with?

Typical fabrications are designed with 300 series stainless steels. However, since we fabricate vessels for rigid corrosion control, we have tremendous experience with high alloys including; Hastelloy, Inconel, Monel, AL6XN, Alloy 2205 and Titanium etc.

What are our capabilities?

The questions listed below, have been given to us in the context of qualifying as a supplier to many of our customers. We have found that most of these questions are answered by the knowledge that we have a Quality System certified to ASME, CE and API standards and have procedures in place that support our answers below.

1. Does Engineering prepare working drawings from specifications and sketches?

Yes - Drawings are prepared using AutoCAD - Calculations are prepared using Code ware - Compress with Finite Element Analysis for nozzle load.

2. Can you design pressure vessels including fractionating towers if given performance data?

We provide mechanical design according to process specifications determined by outside Process Engineers. These Process Engineers are responsible for establishing performance requirements.

3. What is your Quality Policy?

We have more than 20 standing policies that make up our Quality System. An uncontrolled copy of our Quality Manual is available upon request.

4. Is your Quality Control Department independent of production and does it have clear access to Management?



5. What materials have you fabricated with?

Various grade of high nickel alloys (Hastelloy® etc.), 300 series Stainless, and other alloys including the 6% molys (AL-6XN,254 SMO, 926 Mo, 25-6Mo & 1925 hMo), Alloy 2205, Inconel, Monel and Titanium. We also weld carbon steel when required by customer specifications. References can be provided upon request.

6. Describe procedures of assurance of proper shell roundness, location of nozzles, couplings, and attachments, etc?

Each Critical Function Dimension is confirmed, signed and dated by at least two technicians and monitored by Q.C. personnel.

7. Describe your system for quality evaluation and approval of potential suppliers?

References are required for all new suppliers. All incoming material is checked for adherence to P.O. specifications and mill certifications.

8. Do you require that your suppliers have a good quality program? Explain?

YES - On-site inspection of subcontractors is a standard practice. Material suppliers must conform to Purchase Order specifications. Our incoming inspection verifies this quality.

9. Describe your receiving inspection system that checks incoming material shipments?

Material is checked against the specifications listed in our P.O. Items inspected and verified include: material type, dimensions, chemical requirements and physical requirements.

10. Describe your system for quality control of acceptable and nonconforming materials?

Material that meets all the specifications of our P.O. is accepted. Material that does not meet the specifications is marked with a hold tag noting the discrepancy and placed in a segregated area pending return to the supplier.


11. Cutting Equipment
Max. Capacity Number Condition
Automatic Flame Cutting 3" 3 excellent
End Mill 12" 4 excellent
Plate Edge Planer 8" wide 4' hi 4 excellent
Plate Shears 8' X ?" thick 1 excellent
Plasma Arc MANUAL N/A 6 excellent
Saw Mill 24' throat 5 excellent
12. Plate Rolls
Type Pinch
Maximum Plate Thickness 5/8" 1"
Maximum Length 10' 12'
Minimum I.D. 14" 16"
Typical Quality excellent excellent
13. Press Brakes
Plate Thickness 1" 1"
Capacity 750 ton 150 ton
Length 20 ft. 10 ft.
Typical Quality excellent excellent


14. Describe facilities for cold bending, particularly tubing, and limitations?

We have equipment for bending 2" through 6" diameter pipe.

15. Describe forming equipment?

Heads are obtained from qualified sub-contractors. Plate forming is done on press brakes and plate rolls.

16. Describe the shop's weld overlay capabilities of tubesheets, channel, shells, nozzles, etc. Note any specialized equipment?

We utilize manual, semi-automatic, automatic and robot equipment as required by the project and the customer specifications.

17. Number and capacity of welding positioners?

Five powered weld positioners with capacity up to 40,000 lbs.

18. Number and capacity of shell turning rolls?

40 shell turning rolls with capacity up to 200,000 lbs.

19. Machine tools- type, number and capacity?

Horizontal boring Mills Qty.3 - Largest: G&L 10' vertical, 20' horizontal

Vertical boring Mills Qty. 2 - Largest with a 108" swing

Lathes Qty. 4 - Largest 144" horizontal with 18" swing

Drill Presses Qty. 10 - Largest is a 6' radial

Punches Up to 4" diameter through 1" plate

Others Qty. 3 press brakes - Largest 750 ton with 20' bed

20. Heat Treating Facilities in shop (note if subcontracted and to whom)?

Sub-contracted to Metals Engineering and Omega Heat Treating.

21. Describe local stress relieving equipment?

We have in-house vibratory stress relieving equipment.


22. Describe your operating procedures that keep the process in control?

We utilize job routing documents (travelers) to control the critical path through our shop. The progress is monitored by the Shop Superintendent, Project Manager, Quality Control staff and through technician reports.

23. Do your shop mechanics maintain shift logs? What type of information is put in them?

All technician hours are logged by type (weld, grind etc.) and assigned by that technician against an individual project. At shift change, the outgoing supervisor briefs the incoming supervisor current project status.

24. Describe the training your employees receive?

We utilize an apprenticeship program and also work with the local Technical College. Technicians can advance through 8 skill classes by passing rigorous testing procedures.

25. Does your Quality Control Department review process control documents?

All testing documents are reviewed by the Quality Control Manager and become part of the final documentation package.

26. Describe the system you use to test in-process materials?

Mill certifications are required as per ASME Code. Positive Material Identification (PMI) is available upon customer request. All material is tested to be in compliance with customer specifications.

27. What checks are made to ensure nonconforming supplies do not get into the production flow?

At any stage of fabrication, material found to be non-conforming is segregated and a Q.C. Hold tag is placed on the material. Material with a Hold tag cannot be released or used for fabrication. The Hold tag can only be removed by Q.C. personnel.


28. Radiography (RT)?

Subcontracted to Great Lakes Testing Inc., an independent third-party inspection /& testing firm.

29. Qualifications and experience of technicians?

All are a minimum of Level II.

30. Magnetic Particle (MT)?

Type of equipment and condition
Subcontracted to Great Lakes Testing, Inc., an independent third-party inspection & testing firm.

31. Liquid Penetrant (PT)?

Type of equipment and condition
In-house and subcontracted to Great Lakes Testing, an independent third-party inspection & testing firm.

32. Ultrasonics (UT)? Type of equipment and condition

In-house thickness testing only. Remaining requirements: Subcontracted to Great Lakes Testing, an independent third-party inspection & testing firm.

33. Physical Testing Equipment? Hardness Testers

Type Fowler Instrumatic® Analog Hardness tester.


34. Do you have written instructions and test procedures available to inspection personnel?


35. Describe the testing performed to ensure customer specifications are met?

Required tests are determined by the customer specification. Most commonly specified tests are: pressure, ferrite, bend & PMI. Visual inspection is always utilized.

36. Describe the frequency and procedure used to inspect and calibrate testing equipment?

There are written procedures for calibration of each type of test equipment. The procedures are specific to the equipment. The frequency is determined in the procedure but generally is performed every 6 months.

37. Describe facility for pressure testing (including testing mediums available and maximum pressures)?

Hydro testing is done in our shop following our written Hydro test Procedure. Mediums used are water, oil and air. Maximum pressure for liquid is 4,000 psig.


38. Give shipping facilities range?
Railroad North America
Trucking North America
Water Shipment Worldwide


that exceed expectations