Which type of weld is stronger PJP or CJP?
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Which type of weld is stronger PJP or CJP?
Parts A, B, and C of Figure 5.1. 2 illustrate CJP welds. CJP welds made with appropriate filler material are stronger than the base metals that they connect, so strength calculations are not necessary. A PJP weld only fills a portion of the gap as seen in Figure 5.1.
What does CJP mean on weld symbol?
Complete Joint Penetration
The Complete Joint Penetration (CJP) groove weld is a groove weld that extends completely through the thickness of components joined.
What is the difference between CJP and PJP?
To summarize it: CJP means Complete Joint Penetration while PJP Means Partial Joint Penetration. In CJP weld, the weld penetrates from the top of the base metal to the root while in PJP weld, the weld penetration is restricted within the base metal to a pre-defined dimension.
Are fillet welds CJP?
A fillet weld substitution can often be made for CJP groove welds in tension, such as for bolted moment connections where flange plates are welded to the column (W-shape or HSS col- umns).
Is CJP a full pen weld?
A full penetration weld, also known as complete joint penetration (“CJP”), involves a special kind of groove that allows filler material to fill the entire joint gap. That is, the weld penetrates from the toe (top) to the root (bottom) of the joint.
How do you call out a CJP welder?
When a CJP groove weld or a PJP groove weld is used, do not detail specific groove details and do not call out the symbol for a specific weld type (Example: a double-V-groove or square-groove). Instead, point the weld arrow to the joint location and call out CJP or PJP as shown in the following figures.
Which type of weld is stronger?
TIG welding
TIG welding is often considered the strongest weld since it produces extreme heat, and the slow cooling rate results in high tensile strength and ductility. MIG is also an excellent candidate for the strongest type of weld because it can create a strong joint.
What does CP mean in welding?
CP stands for Complete Penetration (ballistics; welding)
How is weld length calculated?
How to calculate length of weld for a lap joint welding?
- Multiply the size of weld and weld strength.
- Divide the maximum permissible tensile stress by the above product.
- Multiply the resultant by 0.707 to obtain the length of the weld joint.
What is the hardest method of welding?
TIG welding is the hardest form of welding to learn for a variety of reasons. The process of TIG welding is slow and takes time to get used to as a beginner. A TIG welder requires a foot pedal to feed the electrode and control the variable amperage while maintaining a steady hand at the welding torch.
How do you call CJP weld?
How is weld width calculated?
The width of the weld cap, w, is given by W = 2(tan b x t) + g. The area of the excess weld metal is approximated by the formula (W x h)/2. The area provided by the root gap by g x t.
What is the main reason for weld failures?
Causes and Remedies of Incorrect Fusion Contamination of metal surface. Cleaning the welding area of the metal surface before welding. Using low heat input. Utilizing the proper heat input for welding.
Why do welders fail?
A weld that is too small or too short for the application can fail from tension, compression, bending or torsional loads. If a weld is made to be in an application where a cyclical load is going to be applied, it will be beneficial to consider a filler metal option with increased impact toughness and ductility.
How do you calculate weld size?
Calculate the weld size, s, at each node on the intersecting edge of the terminated part: SS or DS groove welds: s = t. SS or DS 45 ° fillet welds: s = sqrt(2) × t….Determine the weld section modulus, S w, per unit length:
- DS fillet welds: S w = t w x t.
- DS groove welds: S w = (4 / 3) × (t w 3 / t b) – 2 × t w 2 + t w × t.
How do you choose weld size?
Formula to Calculate the Fillet Weld Size
- The minimum size of the Leg length of the fillet shall be 0.75 (3⁄4) of the material thickness. For example, if the material thickness is 10 millimeters, you should have a fillet size of 7 millimeters.
- In a situation of dissimilar plate thickness, consider the thinner member.
