GOST 7512-82 PDF

Full title and description

GOST 7512-82 — Non-destructive testing. Welded joints. Radiography method. This interstate standard specifies radiographic inspection methods for welded joints made by fusion welding using X‑ray, gamma and bremsstrahlung radiation; it establishes requirements for test technique, sensitivity standards, film and screen selection, radiation sources and image interpretation for welded elements with thicknesses from about 1 mm up to 400 mm.

Abstract

GOST 7512-82 defines a radiographic (X‑ray and gamma) method for detecting typical welding discontinuities (cracks, lack of penetration, pores, slag and other inclusions), sets rules for preparation of welded joints for inspection, specifies sensitivity standards and marking, prescribes film/screen and source selection by material thickness, and gives rules for decoding radiographs and assessing weld quality. The standard includes normative and informative annexes with marking signs for sensitivity and recommended lead screen thicknesses.

General information

• Status: Current / in force (reissue in later editions; maintained in national standards collections; administrative notes and clarifications issued by Rosstandart).
• Publication date: Introduced 1 January 1984 (approved by the USSR State Committee for Standards 20 December 1982).
• Publisher: USSR State Committee for Standards (Gosstandart) — current maintenance/administration referenced through the Russian national standards authority (Rosstandart).
• ICS / categories: 25.160.40 (welding and welded joints — testing of welds); related to 19.100 (non‑destructive testing).
• Edition / version: Designation GOST 7512-82 (original 1982 designation, introduced 1984); includes Amendment No. 1 (issued March 1988). Replaced earlier GOST 7512-75.
• Number of pages: ≈ 20 pages (typical published text length in domestic standard editions).

Scope

This standard applies to radiographic inspection of welded joints of metals and alloys produced by fusion welding where radiographic methods (X‑ray, gamma, bremsstrahlung) are appropriate. It covers welds in parts with effective thicknesses roughly from 1 mm up to 400 mm and is intended to detect volumetric and certain planar imperfections visible under radiographic projection. The document sets requirements for sensitivity measurement, selection of radiation source and exposure parameters, use of intensifying screens and radiographic films, preparation and marking of inspection zones, and rules for interpretation and acceptance of radiographs.

Key topics and requirements

• Definition of radiographic inspection purpose and types of detectable discontinuities (cracks, pores, slag, lack of fusion, inclusions).
• Range of applicable material thickness (approx. 1–400 mm) and corresponding guidance for source energy and exposure selection.
• Standards of sensitivity (wire, groove and plate indicators), marking conventions and placement of indicators on welds.
• Requirements for radiographic film, intensifying screens (metal and fluorescent), cassettes and handling to ensure reproducible image quality.
• Preparation of welds for radiography (cleaning from slag, spatter, scale), marking and numbering of inspection areas.
• Rules for decoding radiographs, assessment of image quality and limitations (e.g., orientation‑dependent detection limits and items not revealed by radiography).
• Safety/shielding guidance (recommended lead screen thicknesses for given radiation sources given in annexes) and references to related normative documents.

Typical use and users

Used by non‑destructive testing (NDT) engineers and technicians, welding inspectors, QA/QC departments in fabrication, petrochemical, pipeline, pressure‑vessel, shipbuilding and power‑generation industries, and by certification bodies and test laboratories that perform radiographic examination of welds. Also used as a reference in technical specifications, contract inspection clauses and training materials for radiographic weld inspection.

Related standards

Linked national and international documents include earlier domestic GOSTs and later GOST R / ISO aligned standards on NDT and radiographic/acceptance levels for welds (examples cross‑referenced in national catalogs and the standard’s bibliography). The standard historically references and is used alongside documents on film types, radiation sources and sensitivity marking; it is shown in catalog listings together with other welding and NDT standards.

Keywords

radiography, radiographic testing, RT, welded joints, weld inspection, nondestructive testing, NDT, sensitivity standards, radiographic film, intensifying screens, X‑ray, gamma, bremsstrahlung, GOST 7512-82

FAQ

Q: What is this standard?

A: GOST 7512-82 is an interstate (Soviet/Russian) standard that specifies the radiographic method for non‑destructive testing of welded joints (X‑ray, gamma, bremsstrahlung) and establishes requirements for technique, sensitivity indicators and interpretation of radiographs.

Q: What does it cover?

A: It covers radiographic inspection procedures for fusion‑welded joints of metals and alloys (approximately 1–400 mm thickness), including selection of radiation sources and films, use of sensitivity indicators, preparation and marking of welds, image decoding and acceptance criteria limitations.

Q: Who typically uses it?

A: NDT practitioners (radiographers), welding inspectors, quality assurance teams in manufacturing and construction industries (pressure equipment, pipelines, shipbuilding, power generation), and laboratories performing contract radiographic examinations. It’s also used by educators and certification organizations as a reference for radiographic practice.

Q: Is it current or superseded?

A: The text of GOST 7512-82 (designated 1982, introduced 1 Jan 1984) has been reissued and amended (Amendment No.1 in 1988) and remains listed in standards catalogs; national authorities (Rosstandart) have issued clarifications as recently as 2024 regarding editorial points, indicating continued administrative maintenance. Users should always verify national applicability and any more recent national or international replacements before reliance.

Q: Is it part of a series?

A: Yes — it is part of the body of standards covering welding, weld testing and non‑destructive inspection (cataloged alongside other GOST/GOST‑R and ISO standards for welded joint testing and NDT methods). It historically replaces GOST 7512-75 and is cross‑referenced with related standards on sensitivity marking, film specifications and radiation source requirements.

Q: What are the key keywords?

A: Radiographic testing, weld inspection, nondestructive testing, sensitivity standards, radiographic film, intensifying screens, X‑ray, gamma, bremsstrahlung, welded joints, GOST 7512-82.