Design welding

Remove all temporary startup or checkout branches, nipples, and plugs, and replace them with properly designed welded plugs. 

Prior to initial operation, each piping installation, including components and workmanship, shall be examined in accordance with the applicable requirements of Part GR and the specific requirements of Part IP or PL, and to any greater extent specified by the engineering design. Weld joints not included in the extent of examinations required by Part IP or PL or by the engineering design are acceptable if they pass VT and the leak test required by para. GR-4.10. 

Unless otherwise specified by engineering design, welding electrodes and filler metals used shall produce weld metal that complies with the following ... 

Current canisters are designed, welded, and tested to criteria specified by the USNRC such that there is no credible design basis scenario by which leakage of radioactive materials can occur. The criteria include the following ... 

Purchaser should obtain approval for the pressure vessels design, welding joints, electrodes, etc. from a statutory authority before placing fabricationorder to vendor... 

No filler material is needed for laser welding with a properly designed weld joint. Besides the challenge of designing a joint suitable for resistance welding, the process of hermetic sealing by resistance welding is often difficult, if it is even possible at all. 

The guidelines for designing welded anchors for embedded plates presented herein are based on ACI 318 Appendix D, and the user should refer to that document for details not included herein. Shear lugs on embedded plates are similar to those discussed in 3.7 except without grout, and will not be discussed further. 

Design welded pipe assemblies that are to be galvanized with fiiU open mitre joints. 

Introducing the Selenium for gammagraphic weld inspection at significantly improved quality levels of the radiographs we have also designed an exposure unit for Selenium. This unit is fuUy compatible with both models, M6 and Ml8. Different from the exposure units for iridium, which are Type B(U) containers, the Source Projector M-SE for Selenium is a Type A container with a maximum loading of 3 TBq (80Ci) Selenium. 

Another design factor is the position in which the weld must be made, which identifies the general orientation of the surface or of the axis of the... 

The magnitude and nature of the load are considered in formulating the design. The load may be essentially quasistatic, cycHc, or impact. Many stmctural failures, for example, have been caused by supposedly innocuous stmctural details welded in place without any consideration given to their effect on fatigue properties. The service temperatures are also important, since they affect the fracture resistance of a material. 

W. Blodgett, Design of Weldments, The James F. Lincoln Arc Welding Foundation, Cleveland, Ohio, 1963. 

Welding Design Fabricat., 17th Annual Welding and Fabricating Buyers Issue (fan. 1995). 

Ultrasonic Welding. Ultrasonic welding has been appHed to Tefzel with weld strength up to 80% of the strength of the base resin. Typical conditions include a contact pressure of 172 kPa (25 psi) and 1—2 s cycle time. The two basic designs, the shear and butt joints, employ a small initial contact area to concentrate and direct the high frequency vibrational energy. 

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