QUALITY STANDARDS AND QUALITY CONTROL IN SHIPBUILDING; A JOINT TASK OF SHIPYARD AND CLASSIFICATION SOCIETY

The subject examined is the welded hull structures of large cargo ships, where use is made of high strength hull steels. The scope of quality standard and control and acceptance limits is examined jointly with the main governing factors, i.e.fatigue, brittle fracture, cold cracking, lamellar tearing; guidelines are given. For fatigue, design curves are reported relevant to joint configuration and butt joints with defects; the latter may serve to establish acceptance limits; basic directions for a quality standard are also given. Factors of the usual formula for crack propagation are indicated for possible details requiring particular analysis. Temperature-thickness values equivalent to V notch impact test requirements of various grades of steel and welding consumables are suggested for given conditions of plane stress or dynamic loading. The relaxations allowable for the heat-affected zone and tests on production welds are given. A quality control programme is outlined and advisable cooperation between shipyard and classification society discussed.

• Supplemental Notes:
  • From Structural Design and Fabrication in Shipbuilding, International Conference, London, England, November 18-20 1975.
• Corporate Authors:

  Welding Institute

  Abingdon Hall
  Cambridge CB1 6AL,   England 
• Authors:
  • Santini, W
• Conference:
  • From Structural Design and Fabrication in Shipbuilding, International Conference, London, England, November 18-20 1975.
• Publication Date: 1976

Media Info

• Pagination: p. 245-280
• Serial:
  • Volume: 1

Subject/Index Terms

• TRT Terms: Cold weather; Cracking; Fracture mechanics; Hulls; Naval architecture; Quality control; Shipbuilding; Shipbuilding materials; Standards; Steel; Strength of materials; Tearing; Weld strength; Welding; Welds
• Uncontrolled Terms: Cold cracking
• Old TRIS Terms: Hull structures; Welding quality control
• Subject Areas: Construction; Marine Transportation;

Filing Info

• Accession Number: 00159468
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Aug 31 1977 12:00AM