ISO 1106-3-1984 PDF

Full title and description

Recommended practice for radiographic examination of fusion welded joints — Part 3: Fusion welded circumferential joints in steel pipes of up to 50 mm wall thickness. This document describes standard radiographic techniques (X‑ and gamma‑ray) and procedural recommendations used to produce repeatable, economical radiographs of circumferential welds in steel piping.

Abstract

This part of ISO 1106 specifies general techniques for the radiographic examination of fusion‑welded circumferential joints in steel pipes (up to 50 mm wall thickness). It focuses on radiographic practice — geometry, exposure technique, film handling and evaluation of radiographic image quality — to enable detection of flaws economically and reproducibly; it does not itself provide modern digital‑detector guidance or the later consolidated procedures found in successor standards.

General information

• Status: Withdrawn / superseded.
• Publication date: December 1984 (Edition 1).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.160.40 (Welded joints and welds).
• Edition / version: Edition 1 (1984).
• Number of pages: 14 pages.

Scope

ISO 1106‑3:1984 covers recommended radiographic techniques for the detection of discontinuities in fusion welded circumferential joints in steel pipes with wall thicknesses up to 50 mm. The scope concentrates on the radiographic method (source selection, film technique, specimen geometry and positioning, exposure calculation and film processing) necessary to obtain suitable radiographic records for interpretation. It does not define acceptance levels for indications (those are covered in later acceptance standards).

Key topics and requirements

• Guidance on X‑ray and gamma‑ray radiographic technique for circumferential welds (source positioning, source‑to‑film distance and alignment).
• Recommended film exposure procedures, film types and processing practices to achieve repeatable image quality.
• Geometry and specimen preparation notes specific to circumferential joints in pipes (fixturing, bevels and joint access).
• Interpretation guidance oriented to producing radiographs suitable for flaw detection (but not prescriptive acceptance criteria).
• Historical context and transition: techniques later consolidated and updated by ISO 17636 series (2003→2013→2022 revisions) which extend coverage to digital detectors and contemporary practice.

Typical use and users

Intended users were NDT/radiography technicians, welding inspectors, fabrication quality engineers and engineering firms engaged in pipe welding inspection. Historically this part served inspectors working on petroleum, chemical, power and pipeline fabrication where circumferential pipe welds up to 50 mm thickness required radiographic examination; contemporary users would refer to the ISO 17636 and ISO 10675 series for up‑to‑date procedures and acceptance criteria.

Related standards

ISO 1106 is a multipart recommended practice (parts 1, 2 and 3) that was later consolidated and superseded by the ISO 17636 series (ISO 17636:2003 and its successors ISO 17636‑1 and ISO 17636‑2). For radiographic acceptance levels see the ISO 10675 series (acceptance criteria). National and industry standards (e.g., various EN, ASTM and national codes) also reference or align with these ISO documents for radiographic technique and acceptance.

Keywords

radiographic testing, radiography, welded joints, fusion welds, circumferential welds, steel pipe, non‑destructive testing (NDT), X‑ray, gamma‑ray, ISO 1106, ISO 17636.

FAQ

Q: What is this standard?

A: ISO 1106‑3:1984 is Part 3 of the ISO 1106 series: a recommended practice describing radiographic examination techniques for fusion‑welded circumferential joints in steel pipes up to 50 mm wall thickness.

Q: What does it cover?

A: It covers radiographic practice (geometry, exposure, film technique and related procedures) to obtain radiographs suitable for flaw detection in circumferential pipe welds; it does not itself set modern digital detector procedures or acceptance levels.

Q: Who typically uses it?

A: NDT technicians, welding inspectors, quality engineers and specifiers involved in pipe fabrication and inspection historically used this part; today practitioners commonly use the ISO 17636 series and ISO 10675 for current technique and acceptance guidance.

Q: Is it current or superseded?

A: ISO 1106‑3:1984 has been withdrawn and was superseded by ISO 17636 (2003); subsequent updates to the radiographic‑testing family include ISO 17636‑1 and ISO 17636‑2 (revisions published 2013 and 2022) which reflect modern film and digital detector practice. Users should refer to the ISO 17636 and ISO 10675 series for current normative practice and acceptance criteria.

Q: Is it part of a series?

A: Yes — ISO 1106 was published as a multipart recommended practice (parts 1, 2 and 3) covering different joint types and thickness ranges; those parts were later consolidated into the ISO 17636 family.

Q: What are the key keywords?

A: Radiographic testing, circumferential joint, fusion weld, steel pipe, X‑ray, gamma‑ray, NDT, radiography technique, ISO 1106, ISO 17636, acceptance levels (ISO 10675).