Question 1

What is Non-Destructive Testing (NDT) and why is it required in South Africa?

Accepted Answer

Non-Destructive Testing (NDT) is the inspection of materials to detect flaws without causing damage. In South Africa, it is legally required under the Pressure Equipment Regulations (PER) and SANS 347 for pressure vessels and boilers to ensure industrial safety and compliance.

Question 2

What certifications do NDT technicians need in South Africa?

Accepted Answer

Technicians must be certified to ISO 9712 or SNT-TC-1A standards as recognized by the South African Institute for Non-Destructive Testing (SAINT). Glospech utilizes Level II and III technicians to ensure all inspections meet ASME and AWS requirements.

Question 3

What is SANS 347 and how does it affect inspection requirements?

Accepted Answer

SANS 347 is the national standard for categorizing pressure equipment hazard levels. It determines the frequency and type of NDT required; for example, Category I equipment mandates volumetric examination of welds during fabrication.

Question 4

How much does NDT inspection cost in South Africa?

Accepted Answer

Costs vary by method and location. Typical call-out fees in Gauteng range from R1,500 to R3,500. Specific tests like Ultrasonic Thickness Gauging cost R180–R350 per point, while Radiography ranges from R650–R1,200 per exposure.

Question 5

When is Post Weld Heat Treatment (PWHT) mandatory per ASME codes?

Accepted Answer

PWHT is mandatory under ASME Section VIII for carbon steel vessels with a nominal thickness exceeding 38mm (1.5 inches) or for vessels in lethal service. It reduces residual stresses to improve structural toughness.

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