What is weld map in piping?
Weld Map. A weld map is a version of the drawing used to number each of the welds or joints contained within it. The process of numbering or annotating each weld’s location is what turns the standard drawing into a map. See the weld map example below; this example includes nine welds and two segments or piping spools.
What is a weld map?
The welding map is the equipment sketch which identifies the welding seams and indicates what welding procedure specification (WPS) shall be used for that particular welding seam. The welding procedure specifications (WPS’s) are provided by the manufacturer to the customer for approval.
What is a weld log?
Traditionally, operators have used a “weld log”- a paper sheet with fields for data points on each weld. This concept of a worksheet filled with fields on a repetitive, manual task is common across many other documents in a production environment, not only the welding industry.
What type of welding is used for pipelines?
Arc welding
Arc welding is the most common type of welding and is a daily activity at pipelines. It brings serious risk of electric shock from the arc that extends between the electrode and the base material used to fuse materials together.
Can you weld with MAPP gas?
Use. Genuine MAPP gas can be used in combination with oxygen for heating, soldering, brazing and even welding because of its high flame temperature of 2925 °C (5300 °F) in oxygen.
What is WPS in welding PDF?
A Welding Procedure Specification (WPS) is the formal written document describing welding procedures, which provides direction to the welder or welding operators for making sound and quality production welds as per the code requirements . A WPS is supported by a Procedure Qualification Record (PQR or WPQR).
What is difference between WPS and PQR?
In case you are wondering, a WPS stands for ‘welding procedure specification’ and a PQR is ‘procedure specification record’. A WPS and PQR are mandatory documents when welds need to comply to a standard. The PQR is a standard document, but the people who use it may not necessarily come from the same background.
What is a PQR welding?
The procedures for creating and testing the sample welds, as well as the final results, are documented on a Procedure Qualification Record, or PQR. In short, a PQR serves as evidence that a given WPS can, in fact, be used to produce an acceptable weld.
What are the 5 basic welding joints?
There are five basic welding joint types commonly used in the industry, according to the AWS:
- Butt joint.
- Tee joint.
- Corner joint.
- Lap joint.
- Edge joint.
What do we need to know about welding maps?
Welding maps are used to track location, size (length and depth) and welder ID associated with repair welds. Weld maps, if done correctly, can be of tremendous help in the event problems develop with quality issues or service-related issues.
What is the welding map for a pressure vessel?
The following sketch illustrates a typical pressure vessel weld map and indicates 4 WPS’s are going to be used for manufacturing of this pressure vessel. The WPS 01 will be used for longitudinal and circumferential joints. The WPS 02 will be used for head to shell joints.
How is a weld map different from a fabrication drawing?
Weld mapping is also sometimes called weld tracking or welding traceability and is usually confused with fabrication drawings. As a matter of fact, both of those are separate components of the metal fabrication process. A weld map is laid out based on the two following features.
Where do you put the identification symbol on a weld?
ASME Boiler and Pressure Vessel Code, Section IX, and ASME B31.3 require that each qualified welder and welder operator be assigned an identification symbol. That symbol shall be marked at each pressure containing weld, or an adjacent area to the weld.
