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.

How do you specify a CJP weld?

The welding symbol without dimensions and with ³CJPf in the tail designates a CJP weld as follows: The welding symbol without dimension and without CJP in the tail designates a weld that will develop the adjacent base metal in tension and shear.

What is PJP weld joint?

The Partial Joint Penetration (PJP) groove weld is a groove weld that does not extend completely through the thickness of components joined. Instead, point the weld arrow to the joint location and call out CJP or PJP as shown in the following figures.

Can a fillet weld be 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 a bevel weld a CJP?

If the bottom “point” of the bevel is seated against the arrow line, then I would interpret it to mean CJP. If there is a “gap” between the sharp point of the bevel and the arrow line, then it would indicate partial penetration, but then they need to give more information such as bevel depth.

What are groove welds?

0 Standard Welding Terms and Definitions as “A weld in a weld groove on a workpiece surface, between workpiece edges, between workpiece surfaces, or between workpiece edges and surfaces.” A weld groove is defined as “A channel in the surface of a workpiece or an opening between two joint members providing space to …

How is weld stress calculated?

To estimate the weld strength:

1. Multiply the size of weld and weld strength.
2. Divide the maximum permissible tensile stress by the above product.
3. Multiply the resultant by 0.707 to obtain the length of the weld joint.

What is a flare V weld?

Flare-V groove welds Commonly used to join two rounded or curved parts. The intended depth of the weld itself is given to the left of the symbol, with the weld depth shown in parentheses.

What are the various types of groove welds?

The basic types of groove welds include:

• Flare-bevel weld.
• Flare-V weld.
• Single-bevel groove weld.
• Single-J groove weld.
• Single-U groove weld.
• Single-V groove weld.
• Square groove weld.

What is a complete joint penetration weld (CJP)?

Complete joint penetration (CJP) welds are unquestionably the least preferred weld type from a fabrication and cost point of view. Unfortunately, they tend to be a frequently specified weld for HSS construction.

What is CJP groove weld?

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. (PQR run with Plate) Type 2: CJP groove weld ( tubular structures OD > 20mm ). A groove weld having CJP and fusion of weld and base metal throughout the depth of the joint.

Why are CJP welds so expensive?

Over-use of CJp welds. It is common knowledge that complete joint penetration (CJP) groove welds are typically the most expensive type of weld and thus should be reserved for situations in which they are the only viable option. In a CJP groove weld, the full strength of the attached materials is developed.

Can CJP welds be used on HSS?

Unlike open sections where welding is possible on both sides of the flanges and web, the interior of HSS sections commonly used in building structures cannot be accessed. Complete joint penetration (CJP) welds are unquestionably the least preferred weld type from a fabrication and cost point of view.