Deep Penetration - Multipass Welding - Bringing It All Together!
As mentioned on our precision metal fabrication page, precision welding is a highly important operation in successfully meeting customer specifications during the fabrication process. We use robotic welding to get repeatability allowing us to control the results.
As a world class manufacturer everything we do with precision welding is governed by the WPS or Welding Procedure Specification.
We have been certified to the CAT 7 Steps to Weld Excellence program now for over 10 years. The WPS is a primary element of the program that acts as a roadmap to structural weld excellence related to precision welding. Essentially it determines how a weld is going to be accomplished and what’s required to do a good weld in terms of quality, penetration and size of the weld.
This process eliminates any variability of operator preferences, including voltage and feed speed. Our operators are trained and tested to work within the parameters to maintain consistency… regardless of who is welding it. Each operator has a WPS on the drawing that tells them the pre-sets or parameters and prohibits any variance based on their preferences.
Finally, every welder has to go through a stringent control process in which they maintain a daily and weekly feedback log in which they are audited for things such as bar-feed reads, gas pressure and size.
Seaberg Industries’ precision welding services can accomplish just about every kind of weld description you can think of including MIG, TIG, square groove, butt-weld and even torch welding.
In complying with customer drawings and specs, we often find ourselves needing to perform specific weld operations like “deep penetration welding” or “multi-pass welding”.
Deep penetration welding or strong welding is a large enough melt of the host metals that it may become a 100% structural join, keeping in mind that a weld is typically stronger than the parent metal. Since strength in these welds are the primary concern, Seaberg Industries has developed a proprietary pre-heating system and that allows us to meet the strength requirements of our customers.
Further, we are so confident in our process that upon customer request, we will provide optional destructive testing of parts, which is also part of the WPS welding process. In short, we will destructively test sample parts to prove they are accomplishing what the customer needs. We do this through cutting and acid etching cross-sections of the part to demonstrate that we have the root and depth penetration into the material that is required.
Multi-Pass welding is determined by weld size in the WPS Welding guidelines and is used for the maximum strength of weld joints. Seaberg Industries weld equipment is capable of multi-pass welds.
Keep in mind that a standard large single-pass weld doesn’t have the strength requirement that the joint needs. But a large weld using the multi-pass welding process will produce the strength requirements and therefore the performance needed.
For more information about Seaberg's Precision Welding Services call (563) 445-2130 or click to contact us.