🖐 What is CJP in welding – AMARINE

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A groove weld having CJP and fusion of weld and base metal throughout the depth of the joint. Consider, for example, the requirements as they relate to Complete Joint AWS D para for welding type design.


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American Institute of Steel Construction (AISC) Steel Design Guide. Welded Figure 39 shows an example of a mixed PJP-fillet weld, also known as a.


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When the Engineer of Record indicates a CJP weld (for example a Aug 16, EOR and Shear Connection Design of Steel Buildings; Aug.


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Groove welds are considered to be either "complete joint penetration" (CJP) or "​partial The certification process requires the welder to create the weld on a sample The SCM Table (SCM pages through ) presents that design.


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If I am designing a CJP Weld and Table J states that the "Strength of the Joint is controlled by the base metal", do the checks of the weaker.


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If I am designing a CJP Weld and Table J states that the "Strength of the Joint is controlled by the base metal", do the checks of the weaker.


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bol for a PJP groove weld shall show dimensions enclosed in parentheses above ³(E1)f the nominal size of the weld (see Figure for examples of flexible.


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bol for a PJP groove weld shall show dimensions enclosed in parentheses above ³(E1)f the nominal size of the weld (see Figure for examples of flexible.


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Restrictions on the Use of PJP Groove Welds. For example, tack welding may be done with SMAW, and the rest of the joint may be filled.


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When the Engineer of Record indicates a CJP weld (for example a Aug 16, EOR and Shear Connection Design of Steel Buildings; Aug.


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Previous Previous post: Back gouging in welding. Figure A shows the root passes, with complete penetration. Email required Address never made public. Qualification testing could similarly permit the use of double-sided joints without back gouging. Notify me of new comments via email. This detail relies on the penetration of the submerged arc welding process to achieve a CJP groove weld. For example, AWS D1. As is frequently the case, this cost-saving effort also improved quality. PQR run with Pipe or Std. CJP complete joint penetratio n : A joint root condition in a groove weld in which weld metal extends through the joint thickness. A review of the prequalified joint details in AWS D1. Pipe small OD. You are commenting using your Facebook account. However, alternatives can be approved in this manner, permitting viable alternatives. The alternative approach replaced the back gouging operation with a unique root pass procedure that ensured a CJP groove weld. Post to Cancel.{/INSERTKEYS}{/PARAGRAPH} Either option is permitted, and when properly made, both should result in a weld throat that is equivalent to the thickness of the thinner base metal joint. AWS D1. In other situations, Code provisions can be waived and alternatives permitted when approved by the Engineer. You are commenting using your Google account. Name required. You are commenting using your Twitter account. This is specifically addressed in AWS D1. Case Study For many years, a fabricator had made CJP groove welds in T-joints for offshore applications, using double-sided joints with back gouging, consistent with the prequalified AWS D1. Notify me of new posts via email. {PARAGRAPH}{INSERTKEYS}According to AWS D1. The overall joint was a tee, composed of two 3 in 75 mm steel members, and was prepared with a double bevel groove preparation, using a 50 degree included angle, no root opening, and no root face. In the preceding case study, the cost savings achieved were impressive. Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in:. Such techniques necessitated WPS qualification testing, but the potential cost savings greatly outweighed the expense of the WPS qualification testing. The key principle that provides understanding in this particular instance is the difference between prequalified Welding Procedure Specifications WPSs and those that are qualified by test. There are two types of CJP which should be understood clearly before going through the topic. A groove weld having CJP and fusion of weld and base metal throughout the depth of the joint. Like this: Like Loading Pingback: AWS D1. Approving alternatives should not be casually approached, and the Engineer is encouraged to rely upon prior experienced engineering judgment, in addition to analytical or experimental data. Equally important, overall quality is expected to be enhanced since reliance is made upon a system that includes careful control of the welding procedures for the root pass, rather than on back gouging operations that are inherently subject to variations in operator skill. PQR run with Plate. It would be easy to conclude that AWS D1. Two pulsed GMAW arcs, operating from opposite sides of the web, simultaneously made the root passes. A groove weld which has been made from both sides or from one side on a backing having CJP and fusion of weld and base metal throughout the depth of the joint. You are commenting using your WordPress.