Ultrasonic Inspection and GPR Services
NORDSTROM TESTING SERVICE
AMERICAN WELDING SOCIETY -CERTIFIED WELDING INSPECTION
ASNT/NON-DESTRUCTIVE TESTING -UT, MT, PT
NACE COATINGS INSPECTION
We are a testing firm focused on welding and coatings
inspections (both visual and non-destructive), fireproofing, reinforcing
steel placement and ground penetrating radar (GPR). With a combined 25
years of experience in the industry we cover a wide range of projects
including hospitals, banks, schools, courthouses, water and wastewater
plants and water storage tanks, pipelines, etc. We provide
non-destructive testing services such as Ultrasonic testing, Magnetic
Particle testing and Liquid Dye Penetrant testing. We are constantly
eager to broaden our scope of work and develop new relationships along
the way. We look forward to working with you in the near future. Thank
you for your attention.
*UT – Ultrasonic Testing
utilizes very short ultrasonic pulse-waves with center frequencies
ranging from 0.1-15 MHz and occasionally up to 50 MHz that are launched
into materials to detect internal flaws or to characterize materials. A
common example is ultrasonic thickness measurement, which tests the
thickness of the test object, for example, to monitor pipework
Ultrasonic testing is often performed on steel and other metals and
alloys, though it can also be used on concrete, wood and composites,
albeit with less resolution. It is a form of non-destructive testing
used in many industries including aerospace, automotive and other
*Our Equipment for Ultrasound Testing and Ultrasonic Inspection.
The EPOCH 600 Digital Ultrasonic Flaw Detector combines Olympus'
industry leading conventional flaw detection capabilities with the
efficiency of a highly portable, intuitive instrument. The EPOCH 600
flaw detector's blend of efficient menus and direct access keys allows
you to take advantage of the highest quality flaw detection platform
with exceptional ease of use.
The large, full VGA transflective display combined with our
patent-pending digital high dynamic range receiver provides a stable,
striking A-scan representation in any lighting condition. Available in
two hardware configurations, the EPOCH 600 offers you the choice to
adjust parameters with a knob or with a navigation area on the keypad.
The EPOCH 600 is designed to meet the requirements of EN12668-1 and
allows a full range of standard and optional flaw detection features.
The rugged, ergonomic design allows use in nearly any inspection
environment, while the flexible PerfectSquare™ pulser and digital
filtering capabilities can tackle nearly any application.
*PT- liquid dye penetrant
testing - Dye penetrant
inspection (DPI), also called liquid penetrant inspection (LPI) or
penetrant testing (PT), is a widely applied and low-cost inspection
method used to locate surface-breaking defects in all non-porous
materials (metals, plastics, or ceramics). The penetrant may be applied
to both ferrous and non-ferrous materials, although for ferrous
components magnetic-particle inspection is often used instead for its
subsurface detection capability. LPI is used to detect casting, forging
and welding surface defects such as hairline cracks, surface porosity,
leaks in new products, and fatigue cracks on in-service components.
*MT- magnetic particle
testing - Magnetic
particle inspection (MPI) is a non-destructive testing (NDT) process for
detecting surface and slightly subsurface discontinuities in
ferroelectric materials such as iron, nickel, cobalt, and some of their
alloys. The process introduces a magnetic field into the part by either
direct or indirect magnetization. Direct magnetization occurs when the
electric current is passed through the test object and a magnetic field
is formed in the material. Indirect magnetization occurs when no
electric current is passed through the test object, but a magnetic field
is applied from an outside source. The magnetic lines of force are
perpendicular to the direction of the electric current which may be
either alternating current (AC) or some form of direct current (DC)
The presence of a surface or subsurface discontinuity in the material
allows the magnetic flux to leak, since air cannot support as much
magnetic field per unit volume as metals. Ferrous iron particles are
then applied to the part. The particles may be dry or in a wet
suspension. If an area of flux leakage is present the particles will be
attracted to this area. The particles will build up at the area of
leakage and form what is known as an indication. The indication can then
be evaluated to determine what it is, what may have caused it, and what
action should be taken, if any.
*Our Equipment for Magnetic Particle Testing:
Magnaflux Yoke The Magnavis7 Y- 7 C/DC magnetic Particle Yoke is
designed for one-person portable magnetic particle inspections of
ferrous parts. Ideal for inspection of welds and other remote testing.
Articulating, double-jointed legs of yokes contour to any part shape to
assure good contact.
Y-7 Core Benefits:
* Used to find both surface and near-surface
* Articulating, double-jointed legs contour to part’s
shape for superior contact
* Solid state controls located in the yoke’s housing
for maximum safety and reliability
* Demag Feature
*GPR- ground penetrating
radar - (GPR) is a
geophysical method that uses radar pulses to image the subsurface. This
nondestructive method uses electromagnetic radiation in the microwave
band (UHF/VHF frequencies) of the radio spectrum, and detects the
reflected signals from subsurface structures. The GPR technology used by
Nordstrom Testing Service is specifically designed to be used for
sub-surface evaluation of cured concrete.
GPR uses high-frequency (usually polarized) radio waves that are
transmitted into the ground. When the wave hits an embedded object or a
boundary with different dielectric constants, the receiving antenna
records variations in the reflected return signal. The principles
involved are similar to reflection seismology, except that
electromagnetic energy is used instead of acoustic energy, and
reflections appear at boundaries with different dielectric constants
instead of acoustic impedances.
Our Equipment for Ground Penetrating Radar:
Hilti PS1000 "X-Scan" (Ground Penetrating Radar) is a radar-based
technology that uses antennas to transmit and receive pulses of
electromagnetic energy through a medium (specifically concrete). As the
radar receives the transmitted pulses it registers “echoes�? from
objects based on their different electromagnetic conductivity.
When the Hilti PS 1000 X-Scan is moved along a concrete surface,
electromagnetic waves are reflected from objects beneath this surface.
These objects are indicated immediately on the display.
The Hilti PS 1000 is designed to be used for concrete inspection only.
The Hilti PS 1000 X-Scan can detect all kinds of metal objects (such as
rebar, tendon cables, copper or aluminium pipes, etc.) and non-metal
objects (such as wood, air cavities, plastic/PVC, electrical conduits,
glass-fiber cables, etc.) embedded in concrete. It can also detect
objects in multiple layers, depending on the condition of the concrete,
rebar mesh spacing, object size and depth, as well as indicate slab
*VT- Visual inspection
is a common method of quality control, data acquisition, and data
analysis used in new construction, renovation and facilities'
maintenance. Visual Inspection typically means inspection of equipment
and structures using one or more of the human senses such as vision,
hearing, touch and smell, and/or any non-specialized inspection
equipment. Inspections requiring Ultrasonic, GPR Services equipment,
Infra-red, etc. are not typically considered as Visual Inspection as
these Inspection methodologies require specialized equipment and
*Fireproofing - a passive
fire protection measure refers to the act of making materials or
structures more resistant to the spread of fire, smoke and heat after a
fire has begun. Most modern day structures are required by applicable
codes to adhere to specific "fireproofing" standards using methods and
systems certified by Underwriters Laboratories (UL). The most common
types of structures utilizing fireproofing standards are Hospitals,
Schools and multi-family/multi-story structures. To perform adequately
in a potentially life-threatening situation, every effort must be made
to ensure the thorough and proper application of all UL listed
fireproofing systems. Thorough and detailed inspection of fireproofing
systems as performed by Nordstrom Testing Service personnel is an
essential step in the construction process.
*Coatings (destructive &
Corrosion is the gradual destruction of material, usually metals, by
chemical reaction with its environment. In the most common use of the
word, this means electro-chemical oxidation of metals in reaction with
an oxidant such as oxygen. Rusting, the formation of iron oxides, is a
well-known example of electrochemical corrosion. This type of damage
typically produces oxide(s) or salt(s) of the original metal. Corrosion
can also occur in materials other than metals, such as ceramics or
polymers, although in this context, the term degradation is more common.
Corrosion degrades the useful properties of materials and structures
including strength, appearance and ability to contain a vessel's
Our Equipment for Coating Inspection:
*Positector Dry film thickness gauge : Certificate of Calibration
showing traceability to NIST included; Built-in temperature compensation
ensures measurement accuracy ; Hi-RES mode increases displayed
resolution for use on applications that require greater precision;
Conforms to national and international standards including ISO and ASTM
Multiple calibration adjustment options including 1 point, 2 point,
known thickness and average zero; Calibration Lock; SSPC PA2 feature set
determines if film thickness over a large area conforms to
user-specified min/max levels (memory (3) gages only); Selectable
display languages; Flip Display for right-side-up viewing; Backlit
display for dim or dark environments; Mils/Microns/mm switchable;
Extended cables available (up to 250 ft/75 m) for remote measuring
In an ever-increasing effort to ensure the well-being and safety of the
public, certain construction items often deemed "standard" or "routine"
have come to the forefront of the construction inspection process.
High-Strength Bolting, as the title implies, is a CRITICAL component of
the construction process. Nordstrom Testing Service has extensive
experience in High-Strength Bolting inspection in accordance with the
Research Council on Structural Connections Using High-Strength Bolts,
from pre-installation verification using a Skidmore-Wilhelm, to final
confirmation of fully-tensioned connections.
- is the practice of
examining rail tracks for flaws that could lead to catastrophic
failures. According to the United States Federal Railroad Administration
Office of Safety Analysis, track defects are the second leading cause
of accidents on railways in the United States. The leading cause of
railway accidents is attributed to human error. The contribution of poor
management decisions to rail accidents caused by infrequent or
inadequate rail inspection is significant but not reported by the FRA,
only the NTSB. Every year, North American railroads spend millions of
dollars to inspect the rails for internal and external flaws.
Nondestructive testing (NDT) methods are used as a preventative measure
against track failures and possible derailment
*Equipment used for Rail inspection is all listed on page including
Starrett Straight Edge.