The maintenance of preheat and interpass temperatures (often linked with auxiliary welding standards). Phase 3: After Welding (Final Evaluation)
ISO 17637:2016 is the primary international standard for the visual testing (VT) of fusion-welded joints
During welding, the inspector must watch for:
Lux meter confirms at least 350-500 lx illumination at the weld face. iso 17637 pdf
If your project follows ISO or EN standards, . If it follows AWS or ASME, you will use those respectively, though ISO 17637 remains a good reference.
: 350 lux is the absolute minimum requirement for the surface being inspected. Recommended
While visual inspection is primarily done with the naked eye, ISO 17637 lists approved aids and measuring tools: Magnifying lenses (typically 2x to 5x magnification). The maintenance of preheat and interpass temperatures (often
A: Single-user licenses prohibit sharing. For a team of 5+ inspectors, buy a multi-user or corporate license from ANSI or the ISO store.
A: Yes, EN 970 has been withdrawn and replaced by ISO 17637. However, some legacy contracts still reference EN 970 – but you should harmonize to ISO 17637 for new work.
: As the weld is built up, ISO 17637 requires that each weld pass or layer be visually examined before it is covered by the next pass. The inspector must check for cleanliness between passes and look for any visible defects such as cracks, porosity, or lack of fusion. If a defect is found, the standard requires that it be reported and appropriate remedial actions be taken before welding can continue. If it follows AWS or ASME, you will
Remember: ISO 17637 gives you the method . Pair it with ISO 5817 (for acceptance) and your client’s specific code requirements. Whether you are inspecting a pipeline, a skyscraper beam, or a submarine hull—this standard ensures that what you see is truly what you get.
A groove melted into the base metal adjacent to the weld toe. Surface Porosity: Pores on the weld surface.
The primary purpose of this standard is to provide guidelines for the of fusion-welded joints. While visual testing (VT) is considered the simplest and most common form of non-destructive testing (NDT), ISO 17637 formalizes the process to ensure consistency and reliability.
Radiographic testing, also known as X-ray testing, is a non-destructive testing (NDT) method used to inspect the internal structure of materials and components. It is widely used in various industries, including aerospace, automotive, and construction, to ensure the quality and reliability of products. The International Organization for Standardization (ISO) has developed a standard for radiographic testing, known as ISO 17637. In this article, we will provide an in-depth look at ISO 17637 and its significance in the field of NDT.