Manual Ultrasonic Testing (UT) Services in Tanzania
Flaw detection and thickness measurement of welds, plates, forgings and castings, carried out to [ASME V / ISO 17640 / AWS D1.1] by [Level II / III] certified technicians.
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- Techniques: straight beam and angle beam [confirm]
- Used on: welds, plate, forgings, castings, tanks, piping
- Codes: [ASME V, ISO 17640, AWS D1.1]
- Personnel: [ISO 9712 Level II / III]
- No radiation, results available on site
Find hidden flaws without damaging the part
A transducer sends high-frequency sound into the material through a couplant. Echoes from cracks, lack of fusion, laminations or the back wall are displayed on a flaw detector, so the technician can judge the position and size of a flaw while on site.
We provide manual UT for [oil and gas, pipeline, power, marine and fabrication] projects in Tanzania, Kenya, Zambia and Rwanda.
Our ultrasonic techniques
Straight beam
Sound enters at 90 degrees. Used for plate lamination checks, forgings, bar and shafts, and for wall thickness.
Angle beam
Shear wave probes at [45, 60, 70 degrees] to inspect welds for cracks, lack of fusion and incomplete penetration.
Thickness gauging
Measures remaining wall thickness on tanks, pipes and vessels to track corrosion. See our in-service inspection service.
Applications
- Butt welds in pipes, plate and structures
- Plate and pipe laminations before fabrication
- Forgings and castings
- Tank shells and pressure vessels
- Shafts, bolting and bar stock
- In-service cracking and wall loss
Typical findings
- Cracks and lack of fusion
- Incomplete penetration
- Slag inclusions and large porosity
- Laminations and inclusions in plate
- Wall thinning from corrosion
- Back wall changes and voids
Our ultrasonic testing process
Plan
Review drawings, procedure, material and acceptance criteria.
Prepare
Clean the scanning surface and apply couplant.
Calibrate
Set up the flaw detector on reference blocks with sensitivity curves.
Scan
Scan the weld or part and record every indication.
Report
Evaluate against the code and issue a signed report.
Calibrated gear, qualified people
Reliable results depend on equipment that is checked before use and technicians who are certified to do the job.
- Digital flaw detector [make and model]
- Straight and angle beam probes [45, 60, 70 degrees]
- Calibration and reference blocks [V1 / V2 / project blocks]
- Couplant for ambient and hot surfaces [confirm]
- Technicians certified to [ISO 9712 / ASNT] Level [II / III]
Codes and standards we work to
| Standard | Typical use |
|---|---|
| ASME BPVC Section V, Articles 4 and 5 [confirm] | UT of welds and of materials |
| ISO 17640 [confirm] | Ultrasonic testing of welded joints |
| ISO 11666 [confirm] | Acceptance levels for ultrasonic testing of welds |
| AWS D1.1 [confirm] | Structural welding code, UT acceptance of welds |
| ASTM E797 [confirm] | Thickness measurement by contact pulse-echo |
| ISO 9712 [confirm] | Qualification and certification of NDT personnel |
Only list the standards your procedures and personnel are approved for.
Manual UT compared with other methods
| Method | Best at | Limits |
|---|---|---|
| Manual UT | Planar flaws, quick on-site results, no radiation, low cost | Depends on operator skill, needs surface preparation, limited stored data |
| Phased array UT | Faster coverage, stored scan images | Higher equipment cost, setup time |
| TOFD | Flaw height sizing | Dead zones near the surface |
| Radiography | Volumetric flaws, permanent image | Radiation controls, access to both sides |
Not sure which method fits your job? We can recommend one, or combine methods for full coverage. See our advanced NDT services.
Reports and records
- Signed UT report with accept/reject results
- Flaw position, length, depth and amplitude
- Weld map or thickness readings table
- Calibration and equipment records
Where we work
- Oil and gas, pipelines and storage tanks
- Petrochemical and power plants
- Marine and offshore fabrication
- Structural steel and general fabrication
Frequently asked questions
Is ultrasonic testing safe?
Yes. UT uses sound, not radiation, so there is no exclusion zone and other work can usually continue nearby.
Can UT replace radiography on welds?
Often, if the code and your client allow it. UT is strong on planar flaws such as cracks and lack of fusion; the choice depends on the specification.
Can you test through paint?
[Often yes with a coating correction, but heavy or loose coating should be removed. Confirm what you offer.]
What surface preparation is needed?
The scanning area must be clean and smooth enough for good probe contact. We advise on preparation before the job.
Which countries do you cover?
[Tanzania, Kenya, Zambia and Rwanda.]
Need ultrasonic testing?
Tell us the material, thickness, code and number of welds. We will reply with a quote and schedule.
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