SY/T 4120-2012 (English Version) PDF

Scope: This standard is applicable to X-ray, γ-ray film inspection and digital imaging inspection and quality inspection of steel pipeline girth welds in direct contact with natural gas media with high hydrogen sulfide content and wall thickness of 2mm ~ 50mm in natural gas gathering and transportation pipelines, battlefields and purification equipment projects. Grading. This standard does not apply to radiographic inspection of composite steel pipe welds, nor to radiographic inspection of oil and gas pipeline pipemaking welds.

SY/T 4120-2012 Referenced Document

GB 11533 Standard for logarithmic visual acuity charts
GB 18871 Basic standards for protection against ionizing radiation and for the safety of radiation sources
GB/T 12605 Non-destructive testing.Test methods for radiographic testing of circumferential fusion-welded butt joints in metallic pipes and tubes
GB/T 19348.1-2003 Non-destructive testing-Industrial radiographic films-Part 1:Classification of film systems for industrial radiography
GB/T 19802 Non-destructive testing.Industrial radiographic illuminators.Minimum requirements
GB/T 23903 Resolution indicators for ray image
GB/T 9445 Non-destructive testing.Qualification and certification of NDT personnel*， 2015-12-10 Update
GBZ 117 Standard for radiological protection in industrial radiography*， 2022-10-13 Update
GBZ 132 Radiological protection standards for industrial gamma-radiography
JB/T 4730.2-2005 Nondestructive testing of pressure equipments - Part 2: Radiographic testing
JB/T 7902 Non-destructive testing.Specification for wire-type image quality indicators*， 2015-10-10 Update

2018 SY/T 4120-2018 Radiographic inspection of girth welds of steel pipelines in gas fields with high hydrogen sulfide content
2012 SY/T 4120-2012 Radiogrphic inspection for circumferential fusion welding joints of steel pipeline in highly hydrogen sulfide gas field