Eddy Current testing is a technique based on passing a small electrical current through a metal. The probes then measure the response, which helps indicate the presence of a defect in a material.

Eddy Current testing is a perfect tool
for inspection of tubes in machines like:

• Heat Exchangers
• Refrigeration Systems
• Commercial Chilled Water AC Units
• Boilers
• Ship Condensers
• Stainless Steel Pipes

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Certified Analysts

A Certified Welding Inspector is an individual who is responsible for overseeing all the activities and duties of the welding staff and ensuring that everything is in proper working manner. A welding inspector’s job is to make sure that the welders work within the set quality and deadline specifications.

Our Certified Welding Inspection services has been certified through the American Welding Society (AWS). CWI covers a wide range of welding inspection requirements.

Typical duties/responsibilities for quality may include, but are not limited to, the following:

• Review customer provided welding specifications to ensure with weld procedures.
• Coordinate with third parties in development of new or modified weld procedures & welder qualifications.
• Witness welding during Welder Performance Testing to verify welder’s ability and perform visual testing prior to sending off for mechanical testing. Also, verify NDE on welded coupons if NDE is required.
• Witness welding and record all essential and supplemental essential variables for new weld procedure qualifications prior to sending out for mechanical testing.
• Maintain Welders Continuity Log to ensure all welders are current in their qualifications.
• Perform visual inspection on all fabricated welds and material for PED, Code, and Third Party inspection orders.
• Assist NDE personnel with any issues or uncertainty of customer specifications or code requirements.
• Assist documentation with all welding and material related issues needed for data books and customer complaints.
• Verify all material for PED and PED manufacturers certificate are valid at time of material manufacture.
• Verify all material per Approved Manufacturer List on all applicable orders & ASME code orders also.

Ultrasonic Testing (UT) involves a beam of high frequency of mechanical vibration or Ultrasonic energy transmitted through the test material is intercepted and reflected by discontinuities back to the receiver. The travel time of the beam is being measured. Knowing the velocity of wave propagation and time the distance to the discontinuity is estimated. Information about the discontinuity such as location, size and type is displayed on the screen.

For Ultrasonic Testing, Tri-State NDT uses computerized Ultrasonic equipment that gives high accuracy of inspection. We specializes the following:

• Welded Rails and Girders
• Pipe joints with full and partial penetration
• Frame structures (cranes, roofs, beams, sheet metal, bridges, etc.)
• Pressure vessels, storage tanks
• Bolts, shafts, crankshafts, axles
• Gears, wheels, pins
• Trucks, railroad cars
• Bonding
• Detection of surface cracks
• Corrosion measurements
• API 653/510 tank inspection

Magnetic Particle Inspection (MT) is a method of locating surface and subsurface discontinuities in ferromagnetic materials. It utilizes the fact that when the material or part under test is magnetized, magnetic discontinuities that lie in a direction generally transverse to the direction of the magnetic field will cause a leakage field, and therefore the presence of the discontinuity, is detected by the use of finely divided ferromagnetic particles applied over the surface, with some of the particles being gathered and held by the leakage field.

This magnetically held collection of particles forms an outline of the discontinuity and generally indicates its location, size, shape, and extent. Magnetic particles are applied over a surface as dry particles, or as wet particles in a liquid carrier such as water or oil.

Magnetic Particle Inspections are the best method for locating discontinuities on or near the surfaces of ferromagnetic materials:

• Cracks
• Laps
• Seams
• Cold shuts
• Laminations

Tri-State NDT is a specialist in the inspection of ship reduction gears, cranes, bridges, beams, shafts, and pressure vessels.

Above and underground storage tanks are required by Federal and State government agencies to have regular inspections.

Companies which pertain to this schedule include:

• Chemical
• Petrol Chemical
• Pharmaceutical
• Some City Municipal agencies such as City Housing and Port Authorities, and so on

Tri-State NDT, Inc. specializes in annual inspection in accordance with API Standards 510, 653 and 650.

A Licensed Professional Engineer will evaluate tank integrity, suitability and life expectancy.

Liquid Penetrant Testing (PT) and inspection is a nondestructive testing method of revealing discontinuities that are open to the surfaces of solid and essentially nonporous materials. Indications of a wide spectrum of flaw sizes can be found regardless of the configuration of the work piece and regardless of flaw orientations.

Liquid penetrants seep into various types of minute surface openings by capillary action. Because of this, the process is well-suited to the detection of all types of surface defects such as:

• Cracks
• Seams
• Porosity
• Laps
• Laminations
• Cold Shuts

Liquid Penetrant Testing is extensively used for the evaluation of wrought and cast products of both ferrous and nonferrous metals, power metallurgy parts, ceramics, plastics, and glass objects. Because of the vast differences among applications for penetrant inspection, two types of penetrants (Type I, fluorescent, and Type II, visible) are used.

Liquid dye penetrant is a perfect method for examining for stress-corrosion and fatigue cracks that are insidious, usually there is very little or no warning of their presence.

This is why it is very important to provide early detection on such structures as cranes, bridges, vessels, piping, where there is risk of possible hard economic consequences and loss of lives.

Visual Inspection is a nondestructive testing technique that provides a means of detecting a variety of surface flaws, such as:

• Corrosion
• Contamination
• Surface finish
• Surface discontinuities on joints (ex. welds, seals, solder connections, and adhesive bonds)

Visual Inspection is the most widely used method for detecting and examining surface cracks, which is particularly important because of their relationship to structural failure mechanisms.

Even when other nondestructive techniques are used to detect surface cracks, visual inspection often provides a useful supplement.

Tri-State NDT uses the latest state-of-the-art Video Recording equipment that includes a Robotic crawler designed to inspect long horizontal distances through pipes and tubes. Video cameras can be inserted in openings as small as 0.250” in diameter.

Flexible or rigid borescopes and magnifying systems are also used to enhance the Visual Examination and Inspection.