1-20 of 148 Search Results for

weld leaks

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780131
EISBN: 978-1-62708-268-6
... Abstract Leaks can occur as the result of several failure causes. This chapter reviews the causes, features, and impact of various types of leaks, namely gasket leaks, O-ring leaks, bond-joint leaks, weld leaks, polyvinyl chloride leaks, valve leaks, and structural leaks. bond-joint leaks...
Image
Published: 01 November 2012
Fig. 8 Stainless steel piping such as small-bore piping is designed to leak before break. A fatigue crack either initiates at the toe or the root of the weld. (a) Typical socket fitting with a fillet weld. (b) Micrograph of a cross section through a socket-welded joint showing fatigue crack More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720411
EISBN: 978-1-62708-305-8
... Abstract Weldments made by the various welding processes may contain discontinuities that are characteristic of that process. This chapter discusses the different welding processes as well as the discontinuities typical of each process. It provides a detailed discussion on the methods...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030089
EISBN: 978-1-62708-282-2
... Recovery Unit In December 1983, two leaks were discovered at a sulfur recovery unit. More specifically, the leaks were at pipe-to-elbow welds in a 152 mm (6 in.) diameter line operating in lean amine service at 50 °C (120 °F) and 2.9 MPa (425 psig). Thickness measurements indicated negligible loss...
Image
Published: 01 December 2018
Fig. 6.168 (a) Transverse cross section of a tube at a few millimeters distance from the leak indicating metal wastage on outer surface. (b) Poor quality of welding with porosities and deep ripples, 6× More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930217
EISBN: 978-1-62708-359-1
... Abstract This article reviews the fundamental and specific factors that control the properties of steel weldments in both the weld metal and heat-affected zone (HAZ). The influence of welding processes, welding consumables, and welding parameters on the weldment properties is emphasized...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820013
EISBN: 978-1-62708-339-3
... Abstract Carbon and low-alloy steels are the most frequently welded metallic materials, and much of the welding metallurgy research has focused on this class of materials. Key metallurgical factors of interest include an understanding of the solidification of welds, microstructure of the weld...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820077
EISBN: 978-1-62708-339-3
... at the fusion line. Source: Ref 23 Improper PWHT can, however, lead to corrosion failures. Example 2 describes failure of type 430 tube-to-header welds that failed in a heat recovery steam generator because of problems associated with PWHT. Example 1: Leaking Welds in a Ferritic Stainless Steel...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870101
EISBN: 978-1-62708-314-0
..., if the tool is very large, like the one shown in Fig. 4.12 , the sections are welded together. All welds are ground smooth, the faceplate is finished to give a smooth surface, and the tool is vacuum leak checked. Normally, this type of tool will have integral vacuum manifolds incorporated around...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430351
EISBN: 978-1-62708-253-2
... the failure in the corrosion fatigue mode. Case Study 38—Failure Investigation of Waterwall Tube Background Details The waterwall tube of a 620 MW boiler leaked in the form of a pinhole near the junction of a weld between the tube and a fin and a butt weld between the tube and tube attachments...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270059
EISBN: 978-1-62708-301-0
... a reconstruction, producing a major environmental impact. The tank was first built in 1940, dismantled in 1986 leaving the old welds in place, and reconstructed in 1987, radiographed and leak tested. It was a case of brittle fracture in the base metal of the tank, alongside a weld. The investigation revealed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930085
EISBN: 978-1-62708-359-1
... stage. Other NDE Methods also Exist Acoustic emission and leak testing are worth mentioning here because of their use in weld testing. Acoustic emissions are stress waves generated from crack growth and plastic deformation. Therefore, the weld has to be loaded. The emissions range in frequency...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930163
EISBN: 978-1-62708-359-1
... high-temperature creep plastic collapse weld discontinuities IT IS GENERALLY ACCEPTED THAT all welded structures enter service containing flaws that can range from volumetric discontinuities, such as porosity or slag inclusions, to planar defects, such as a lack of side-wall fusion or hydrogen...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900039
EISBN: 978-1-62708-350-8
... heat losses, and factors influencing furnace configuration and design. It also covers the processes involved in the construction and maintenance of retorts, methods for sealing a retort to prevent ammonia leaks, and safety precautions to be taken while using ammonia. Further, the chapter provides...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030096
EISBN: 978-1-62708-282-2
... ring was used, which left a crevice after welding. The sample was taken from a leaking brine cooling coil used in the production of nitroglycerin. The cooling coils contained calcium chloride (CaCl 2 ) brine inhibited with chromates. Coils were made by butt welding sections of seamless type 304L...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610001
EISBN: 978-1-62708-303-4
... are often performed to predict when the next internal or external inspection should be performed. Typical life-limiting mechanisms include stress-corrosion cracking, fatigue, and thermal fatigue. Welded structures that could initiate a crack are often susceptible to these mechanisms. The leak-before-break...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200158
EISBN: 978-1-62708-354-6
... is in the prevention of leaks of potentially harmful chemicals ( Figure 11-11 ). Fig. 11-10 Cast-weld pump. Two cast halves of a pump being welded together using submerged arc techniques. Castings are produced with the weld groove cast-to-shape. Fig. 11-11 Cast CF-8M alloy gate valve with cast...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820043
EISBN: 978-1-62708-339-3
... Abstract Austenitic stainless steels exhibit a single-phase, face-centered cubic structure that is maintained over a wide range of temperatures. This chapter provides a basic understanding of grade designations, properties, and welding considerations of austenitic stainless steels. It also...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780093
EISBN: 978-1-62708-268-6
..., leak paths, and other conditions not readily apparent using visual or other assessment techniques. Techniques in this area include x-ray and n-ray radiography, dye penetrant inspection, fluorescent dye pressure testing, and magnafluxing. Mechanical and environmental approaches for evaluating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820177
EISBN: 978-1-62708-339-3
... Abstract This chapter reviews weld corrosion in three key application areas: petroleum refining and petrochemical operations, boiling water reactor piping systems, and components used in pulp and paper plants. The discussion of each area addresses general design and service characteristics...