Connections welded

Main steamline section and weld of the same Unit 4 f600 MW3 as above the weld connects 2 steamline sections of different materials (stainless steel and low-alloy steel) through a transition material section, ahead of the Y-piece where branching of the turbine inlet lines takes place (255 mm internal diameter, 44.5 mm thickness). Ultrasonic inspection pointed out potential integrity problems in the weld. The requirement was again that AE could support safe operation of the weld until the next incoming planned maintenance shutdown. 

High selective performance of the sensor also enable to detect surface cracks in ferromagnetic and non-magnetic welded connections under rust or dirt layer without prior cleaning. 

Flat face flange. Appendix Y. Fig. UA-111Q Welded connection. UW IS. UW 16. Fig. UW 15.1 Opening. UG 35to UG 42, UA 7. UA 280 Multiple openings. UG-42 Non pressure parts. UG-6, UG-22. UG-SS. UG-82 Hemispherical head. Pressures. 

The data in Table 4-1 show the considerable influence of the electrical resistivity of soil. This is particularly so in categories 2, 7, and 10. From a profile of the soil resistance along the course of a pipeline with welded connections or with electrically conducting thrust couplings, one can readily recognize anodic areas, and... 

A single or multicored plastic-coated cable of the type NYY or NYY-O is used as the connecting cable between a protected object and an anode in soils and fresh water, and particularly in seawater, medium heavy or heavy rubber-sheathed connections of an NSHou or NSSHou type are used. Heavy welded connections of type NSLFSou are used for severe mechanical loading. In addition to these, for ships, marine cable of type MGCG or watertight cables must be considered. 

Figure 2-21. Equivaient iength of fittings for pipe systems. Note preferred use for 1 / in. and larger pipe butt-welded or socket-welded connections (this author). By permission. Tube Turns Div., Chemitron Corp. Bull. TT 725,1952, reference now to Tube Turns Technologies, Inc.

When clad metal is used, it is often specified as %-in. or A-in. minimum clad thickness. This is usually sufficient to allow proper weld connections. Care must be used in sealing all internal joints of clad material to prevent exposure of the base metal. 

The most recently developed anode for the cathodic protection of steel in concrete is mixed metal oxide coated titanium mesh The anode mesh is made from commercially pure titanium sheet approximately 0-5-2mm thick depending upon the manufacturer, expanded to provide a diamond shaped mesh in the range of 35 x 75 to 100 x 200 mm. The mesh size selected is dictated by the required cathode current density and the mesh manufacturer. The anode mesh is supplied in strips which may be joined on site using spot welded connections to a titanium strip or niobium crimps, whilst electrical connections to the d.c. power source are made at selected locations in a suitably encapsulated or crimped connection. The mesh is then fitted to the concrete using non-metallic fixings. 

In all blast-resistant structures (steel, concrete, or masonry) special attention should be given to the integrity of connections between structural elements up to the point of maximum response. For example, it is important to prevent premature brittle failure of welded connections to avoid stress concentrations or notches at joints in steel structures and to provide ductile reinforcement detailing in concrete/masonry structure connections. For all materials, it is recommended that connections be designed to be stronger than the connected structural members such that the more ductile member will govern the design over the more brittle connection. 

Closure Welds. The final weld connecting piping systems or components that have been successfully tested in accordance with para. IP-10.6 need not be leak tested, provided the weld is examined in-process in accordance with para. IP-10.5.1(c)(8) and passes with 100% radiographic examination in accordance with para. IP-10.5.2 or 100% ultrasonic examination in accordance with para. IP-10.5.5. 

Liquid penetrant examination shall be performed on all welds connecting to hydrogen piping system components which are not radiographed. 

Leaks due to weld cracks resulting from thermal cycling or high stress may occur at any of the weld connections. 

Fusion welded connections Por. UW-15 ond Fig.UW-16 docketed vessel Closure ring. App-9 Jacketed vessels Par. UG-27,28,47 ULW-22,App-9... 

Piping for LNG service is connected via threaded joints, flanged connections, swaged fittings, or welded connections. Welding provides the most secure connection and should be used whenever possible. Flanged connections are suitable and should be used where welded connections cannot. Threaded connections... 

The factor of the resulted heat emission of a hydride bed generally is proportional to effective heat conductivity of a bed and inversely proportional to thickness of a bed. The analysis of these equation shows, that factor of a heat transfer less than smaller factor of a heat emission and consequently it is of no used to increase strongly one of them, thus, not changing another. Results of experiments show, that for brazed and diffusion welded connections of the sorber case and heat-conducting insert R=(0.5-1.5) TO 5 (m2 K)/W. At contact of an insert and the case on tight fit R increases in 10-100 times and influence of contact resistance becomes comparable with influence of the resulted heat emission of a hydride bed. 

Current polymer pipes used for transportation of natural gas at pressures under 0.4 MPa have sufficient strength to carry hydrogen, and diffusion losses arising mainly from pipe connectors have been estimated at three times higher for hydrogen than for natural gas (Sorensen et al, 2001). Transmission of natural gas at pressures up to 8 MPa uses steel pipes with welded connections. Most metals can develop brittleness after absorption of... 

In the experiment with 0.2 mol/kg HCl the liner was stiffly connected with the Ni-base alloy of the reactor. After experiment, the metallographic analysis revealed that the welding connection has leaked... 

A Longitudinal or spiral welds in the main shell, necks or nozzles, or circumferential welds connecting hemispherical heads to the main shell, necks, or nozzles ... 

C Welds connecting flanges, tube sheets, or flat heads to the main shell, a formed head, neck, or nozzle ... 

---