Menu Menu

Your Single-Source Provider for Turnkey
Maintenance and Inspection Solutions

NACHER Divisions - Back
NACHER Divisions - Forward


NACHER‘s Corrosion Services division provides corrosion removal, mitigation, prevention, and coating solutions to ensure each asset serviced meets full mechanical integrity (MI) and compliance by eliminating the damaging effects of corrosion. NACHER works to extend the useful life of material assets by utilizing ultra-high pressure (UHP) water and sand blasting equipment, and protective coating applications.

NACHER‘s Corrosion division remains the market leader for corrosion removal and treatment programs in the Gulf of Mexico, ensuring quality outcomes and compliance with best-practice industry standards and by API bulletin 91 “Best Management Practice.”

Mechanical Integrity (MI) Compliance via Corrosion Removal, Mitigation, Prevention and Coating Solutions
Traditional and Advanced NDT Solutions

Inspection and
Engineering Services

NACHER’s Inspection & Engineering division, in conjunction with its parent company, MISTRAS Group, Inc., provides traditional and advanced nondestructive testing (ANDT), Mechanical Integrity (MI) services, and process safety management (PSM) techniques that comply with regulatory codes and industry standards.

NACHER’s methodologies combine the skilled expertise of highly trained technicians and “fit for purpose” equipment to optimize an asset’s productivity, profitability, and useful life. By maintaining the safe and efficient function of an asset, NACHER helps its clients maximize in-service availability, reduce failures and minimize asset downtime.

Nondestructive Testing (NDT) and Nondestructive Evaluation (NDE) Services

Maintenance and
Construction Services

NACHER’s Maintenance & Construction division offers highly skilled flange torquing, welding, bolt tensioning, and vessel head makeup and removal services. Supported by fully compliant process safety management (PSM) techniques and industry compliance standards, NACHER ensures optimal function and efficiency of assets.

NACHER‘s Maintenance & Construction division provides services to optimize asset function during repairs and installation periods to reduce failures, secondary damage, and downtime.

Flange Torquing, Welding, Bolt Tensioning, and Vessel Head Makeup and Removal Services


NACHER’s Industrial Services division provides the removal of elemental and chemical build-up for tank and vessel assets in the drilling and exploration sector of the oil and gas industry, improving an asset’s function and efficiency.

NACHER’s Industrial Services division neutralizes affected areas of accumulated mud, rust, scale, chemical, and old coatings before vacuum removal services are applied. NACHER’s Industrial Services are also suited to handle Naturally Occurring Radioactive Material (NORM) conditions, performed by NACHER’s own Radiation Safety Officers (RSO).

Chemical Buildup Removal, even in Naturally Occurring Radioactive Material (NORM) conditions
NACHER Divisions - Back
NACHER Divisions - Forward
NACHER Flange Cuff™

Flange Cuff

NACHER Flange Cuff™


NACHER's Flange Cuff™ technology provides a simple, safe, and effective solution to install and replace 4-bolt pattern flanges on upstream oil and gas piping assets. The Flange Cuff™ offers the ability to sustain pressure, divert stress, and eliminate hazards during the replacement, installation, and maintenance of flange equipment.

The Flange Cuff™ also allows NACHER technicians to torque, tension, and maintenance flange equipment in full compliance with industry and regulatory agencies. By stabilizing bolted sections of in-service piping, the Flange Cuff™ safely accommodates "hot bolt" tensioning methods, minimizing potential risk to human and piping assets, while promoting a prompt return of flange equipment.


The Flange Cuff™ comes in 2 frame sizes with inter-changeable teeth to accommodate 1”, 1½”, 2” and 3” flange diameters and fits all 150# raised faced flanges. The small compact, robust and chain-like design allows for easy access to flanged connection in tight areas. The Flange Cuff™ was designed to meet the minimum allowable stress values in accordance with ASME B31.3 and ASME Sec. VII, Div. 1.

Flange Cuff with Accessories

Case History

The Flange Cuff™ was utilized to assist a client with findings from a Regulatory Inspection. The client was faced with changing out numerous bolts throughout the facility. The project was estimated to last approximately 8 months and required numerous man-hours planning unit shut-ins and execution.

The Flange Cuff successfully reduced man-hours, project planning costs, and minimized risks during equipment start-up. The project was completed within 6 months and the facility was able to maintain production.

Flange Cuff


The Flange Cuff™ is designed as an inclusive unit with a single torque point swing bolt. The single torque point eliminates the need for multiple components such as hydraulic clamps and modular clamps.

The torque value is determined by the size of the flange and is applied at the single torque point. The torque value meets the required gasket seating force. This unit can be used while working at heights to reduce potential dropped objects.

Flange Cuff

Hot Bolting

Once the Flange Cuff™ has been installed at the recommended torque values, then recommended Hot Bolting Procedure may be followed. Only one stud at a time may be removed then replaced with new. Once the new stud is installed, it is recommended to hand tighten and torque the stud to 5 foot-pounds of torque. Each stud is replaced and torqued in a cross pattern sequence according to Best Practices flange maintenance techniques.

Inspection and Quality

Before determining whether a Flange Cuff™ can be used, the flange connection must meet or exceed the minimum requirements of the Flange Cuff™ Procedure. Flanges discovered to hold integrity concerns cannot support "Hot Bolt" techniques using the Flange Cuff™. After completed Flange Cuff™ service, a quality report must be submitted to archive in the historical data.

NACHER Safety Performance


Safety is a NACHER cornerstone, supporting our ability to provide quality and incident free work. NACHER’s safety protocols adhere to Occupational Safety and Health Administration (OSHA), American Petroleum Institute (API), and incorporate proactive safety standards. NACHER is committed to ensure the health and safety of its personnel and the preservation of the environment, supported by a historically low recordable incident rate.

Total Recordable Incident Rate

NACHER Safety Excellence
NACHER Training & Competency

Training & Competency

NACHER provides industry-leading Training & Competency resources to enhance industry practices and ensure the success of our greatest asset, our personnel.

We operate a state-of-the-art training facility, designed for rope access, on-site simulations, equipment training, and safety and rescue procedures.

Rope Access Training Safety and Rescue Training and Competency On-site Simulations Rescue Training Facility At Height Inspection
Rope Access Training Safety and Rescue Training and Competency On-site Simulations Rescue Training Facility At Height Inspection


NACHER Corporation, a MISTRAS Group, Inc. member company, was founded in 1991 and has continually grown into a multi-discipline turnkey service provider for the Oil & Gas industry.

As a single source service provider, NACHER operates in four divisions, offering Inspection & Engineering, Corrosion, Industrial, and Maintenance &
Construction Services.

NACHER supports training opportunities, specialized equipment, and resources to offer a wide-range of nondestructive evaluation (NDE) and testing (NDT) services to meet the needs of project and customers.



NACHER Corporation aims to be the single source service provider for turnkey maintenance and
service solutions.

Our goals begin with our loyal and skilled staff, maintaining a safe workplace, respecting the environment, and adhering to the highest standards of quality and integrity. We continually strive for excellence, by establishing partnerships through ethnical business practices, customer service, trust and the successful outcomes for all of
our service offerings.



NACHER Corporation, a MISTRAS Group, Inc. member company offers health insurance, supplemental insurance, and 401k retirement plans. If you are interested in any employment opportunities, please click the button below. Contact Us



NACHER strives to achieve quality outcomes by exceeding the expectations of our customers and setting new industry standards in every facet of our business. By maintaining a collaborative relationship with customers, NACHER outlines specific project requirements to ensure each task is fulfilled
and performed correctly.


Please use the form below to contact NACHER with any questions or comments.