WTTI's team of experienced Certified Welding Inspectors (CWIs and SCWIs) are certified by the American Welding Society (AWS). Whether the application of the welded parts is structural, military, aerospace, or bridge components, we are committed to verifying that the product meets the requirements of the code or specification.
Common QA/QC services include:
- Contract and drawing review prior to beginning work
- Examination prior to fabrication
- Examination during in-process fabrication
- Examination post-fabrication
- Examination following secondary processing e.g. machining, heat treating, grinding, plating, etc.
- Examination for in-service damage e.g. cracking, wear, heat damage, corrosion, etc.
WTTI offers third party review of radiograph film and images. Our trained AWS Certified Radiographic Interpreters (CRI) and ASNT Level III RT certificate holders can detect, interpret and evaluate your media. We can determine if quality and code requirements have been met on castings and weld material.
WTTI can help you choose and then perform the right inspection method for your project. Inspection can be performed at WTTI or in the field. Examinations are conducted in accordance with code requirements such as: AWS, ASME, API, ASTM, ISO, MIL STD, etc. and the customer’s quality assurance standards.
Nondestructive Inspection methods include:
- Magnetic Particle (MT)
- Liquid Penetrant (PT)
- Ultrasonic (UT)
- Visual (VT)
- Radiographic Inspection (RT)*
*All methods except RT can be performed in the field.
Qualified inspectors possess extensive training, experience, and wide-ranging industry expertise. They are AWS Senior Certified Welding Inspectors (SCWI) or AWS Certified Welding Inspectors (CWI), as well as ASNT Level II or Level III certificate holders working under the supervision of Nationally Registered ASNT Level III Examiners.Our inspectors follow established, written test procedures that define the equipment, responsibilities, techniques, and operational steps for specific examination methods. These procedures ensure consistency, code conformance and the effectiveness of actual test activity so our customers can be confident about the reliability of test results. Examinations are concluded with the prompt delivery of clear, accurate reports.
|PT Inspection||Performed using visible or fluorescent dye to flaws open to the surface. PT can be
used on both non-ferrous and ferrous metals.
|MT Inspection||Detects surface and subsurface discontinuities in ferrous materials by applying a magnetic field and ferromagnetic powder.|
|VT Inspection||Most commonly used NDT method. Requires minimal equipment and complete access to facilitate inspection.|
|UT Inspection||Volumetric inspection method using ultrasonic waves. Requires direct contact with inspection area and can be done using straight beam, shear wave, or as thickness measurements.|
|RT Inspection||Volumetric inspection method using radiation. WTTI’s enclosed X-ray cabinet is 44” deep x 51”wide x 56’’ high. Steel specimens up to 3” thick and aluminum specimens up to 12” thick can be examined. WTTI can produce film or digital x-ray images.|
WTTI offers a variety of field testing services for material traceability and quality control. These include:
- Ferrite testing using a Fischer Feritscope MP30-ES to measure ferrite content in austenitic stainless steel and duplex materials
- Positive Material Identification (PMI) to identify alloys and provide an elemental analysis
- Ultrasonic Thickness Measurements to monitor corrosion loss and verify design conformance
- Portable Hardness to conform with NACE and API standards
- Videoscope Inspection of small and large diameter tubing
- Bolting Inspection per RCSC requirements
WTTI offers verification of calibration for welding equipment and welding electrode ovens, with or without temperature controls.
Our procedures meet the requirements of AWS D1.1, AWS D1.5, AWS D17.1, AWS QC 4-89, NAVSEA Tech Pub 248, and similar specifications requiring verification of equipment accuracy. Our testing equipment is calibrated annually and traceable to the National Institute of Standards and Technology.
WTTI provides two forms of calibration documentation:
- A data report detailing all pertinent information about the welding unit and/or rod oven to be kept on file, and
- A calibration label to be attached to the welding unit and/or rod oven attesting to its meter calibration.
Calibration must be performed annually and after any major maintenance. The duration between calibration depends on the code requirements. For example, AWS D1.5 requires calibration every 3 months.
Did you know?
The term "calibration" refers to the verification and validation of the equipment used for welding.
Calibration ensures that your welding machine is operating within the parameters of your welding procedure. If an uncalibrated machine is used for welding and the fabricated piece fails in service, the company responsible for the weld and for not calibrating their machines can be held liable.
Contact WTTI to arrange for calibration of your welding equipment and rod ovens.