Steel Fa brication & Welding
With over 50 years of welding and fabrication experience and specialization in Stainless-Steels, James Ross/SMS is your primary choice for the Highest Quality results when it comes to serving your welding needs. All of our welders are CWB Certified to CSA W47.1, W59.13 and are equipped with the most up to date training and safety equipment. We take great pride in maintaining the upmost stainless-steel welding standards possible, and constantly remain focused on continual improvement for welding and all of manufacturing related work methods. Whether your needs are small, or large, our five huge welding bays and four high tonnage capacity overhead cranes can easily and safely manage the tasks at hand.
Procedures and Related Importance:
Prior to order processing, we verify that all raw material utilized matches the customer’s order requirements, and is marked for traceability. In addition, the Stainless-Steels we purchase (in all product forms) must fully meet the applicable ASTM specification, if not, it is quarantined and will not be used. This ensures our customers receive premium quality results from start to finish. Raw Material Mill Test Reports (MTR’s) are also available upon request. While not always required, these are the “Blueprints” of the material that show the exact Chemical and Physical properties for the grade at hand. For James Ross/SMS, the purchase of raw material does not solely come down to price, instead quality must also meet our minimum standards. One interesting and important example or this relates to welding filler metal. It must be over alloyed to ensure the weld itself is equal to, or better than the adjoining Stainless-Steel materials (304, 304L, 316, 316L or whichever grade may be involved). Therefore, our quality program requires ongoing verification of welding filler metal properties. Since the weld quality is the most important part of a Stainless-Steel manufactured assembly… we never hold back.
Our expertise is the manufacture of Stainless-Steel products, so James Ross/SMS goes the extra mile to also eliminate Stainless-Steel being contaminated with Carbon Steel (cross contamination) during manufacture. We achieve this by placing inert padding on all of our smaller work handling and support surfaces. When it comes to the much larger support surfaces (e.g. welding booth tables etc.) these are made using Stainless-Steel as the contact surface which completely solves any risk of cross-contamination.
As we say at James Ross/SMS… “Quality First – Do it Right the First Time”.
We take no shortcuts, instead we spend the time making sure our welds will be 100%. This requires robust procedures for complete verification of all equipment and settings prior to stainless-steel fabrication and welding. For example, operational settings involving areas such as Shielding Gases, Flow Pressures and Equipment Amperage must be absolutely correct prior to weld commencement. Without doing this, high risk of failures exist. Such failures can be:
- Weld Porosity
- Weld Cracking
- Weld Undercut
- Incomplete Weld Fusion
- Incomplete Weld Penetration
- Slag Inclusions
Many of our customers complain about having had to deal with such defects. This regretfully is a fairly common occurrence when dealing with weld shops that are not specialized in Stainless-Steel. The most dangerous situation is when these failures go un-noticed! Once equipment is in service, these errors can result in accelerated failures, shut downs and safety risks. Unless fully verified, low costs at the start can spell extremely high costs in the end.
Weld Surface Preparation
Prior to welding, we clean all related surfaces to ensure no risks exist for weld failure. We do this by utilizing various methods which range from mechanical sanding with belts pads, sponges or Stainless-Steel wool. If we are reconditioning a used component, we will perform Abrasive Blasting using Pure Silica Glass Bead. For re-conditioning components that have severe internal surface contamination (Pipe etc.), we use a Pickling (Acid) Bath to ensure all surfaces are non-contaminated.
Final Preparation and Inspection
Once welding is complete, we then perform a 100% visual inspection, this to ensure no faults exist. In the event a fault is identified, we quarantine the component in question and perform Define, Measure, Analyze, Improve and Control (DMAIC) as per our Quality Standards. Once all visual inspections have passed, welds are then cleaned to allow for full passivation to take place.
Cleaning is performed by one of 3 methods.
- Method 1: Mechanical surface cleaning. This is performed with Sanding Pads, Abrasive Sponges or Stainless-Steel Wool (Grit will match end use application which can range from Industrial Service to Fine Food Grade Quality). This is used on small areas or surfaces that require more detailed attention. Thereafter, once this process is complete and exposed to ambient air, the Chromium Oxide layer will re-deposit itself on the Stainless-Steel surface and be Passivated.
- Method 2: Abrasive Blasting. This is performed in our Giant, Full Recovery, Blast Room. For this process we use Pure Silica Glass Bead in a fully enclosed environment that is Government, Environment and Safety approved. Once complete, the Stainless-Steel surface once again re-passivates itself.
- Method 3: Pickling Acid Bath. Under very demanding circumstances, we immerse components in an Acid Bath. This removes a very thin layer from the Stainless-Steel surface and immediately re-deposits the Chromium Oxide Layer (Passivation) on all surfaces. The Acid Bath is particularly suitable for Small Components and Piping Internals (Loose or Spooled piping systems).
Post Weld Testing
On occasion, more significant testing is required. To support such requests, we offer the following:
- Non-Destructive Tests (NDT)
- Liquid Penetrant
- Magnetic Particle Inspection
- All NDT Technicians are certified to CGSB 48.9712 and SNT-TC-1A standards which is recommended practice.
Stainless-Steel Welding & Fabrication
For more information regarding our fabrication and welding services and capabilities in Toronto, Montreal and New York region, please contact our James Ross/SMS team today.
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