Welding and Fabrication
Welding and Fabrication
Proper surface cleaning and preparation is paramount to ensuring the creation of high quality welds on oil and gas equipment.
Below are tips on welding tools to improve those activities and minimize the risk of failure and subsequent damage to both plant and personnel.
Use the Right Tools for Surface Preparation
Strong, durable welds are achieved through full penetration into the base metal. This requires the elimination of weld inclusions and porosity. Proper surface preparation is essential to achieving this.
here are three tools that are commonly used for this purpose:
Flap discs – The ends of pipes are beveled using flap discs to form a V-joint for the weld. Flap discscan also be used to remove any rough edges or pitting on the beveled ends.
Grinding wheels – A grinding wheel is used to square off the face of pipes to facilitate perfect alignment before welding commences. Once the weld root pass is laid, a thicker wheel is employed to grind the bead, reshaping the root and removing any excess build-up before the next pass. If necessary, grinding can occur between each successive pass.
Stringer bead brushes – Stringer bead brushes are used between passes to remove slag inclusions in the weld.
CODES, STANDARDS & SPECIFICATIONS
Tradeland co has an experienced fabrication shop qualified to meet the following codes, standards, and specifications.
American Water Works Association Standard for Welded Steel Tanks for Water Storage
American Petroleum Institute Standard 620: Recommended Rules for Design and Construction of Large, Welded, Low-Pressure Storage Tanks
American Petroleum Institute Standard 650: Welded Steel Tanks for Oil Storage
American Petroleum Institute Specification 12F: Shop-Welded Tanks for Storage of Production Liquids
Steel Tank Institute Standard F911 for Diked Aboveground Storage Tanks
Steel Tank Institute Standard F921 for Aboveground Tanks with Integral Secondary Containment
Steel Tank Institute Standard F941 for Fireguard Thermally Insulated Aboveground Storage Tanks
Steel Tank Institute Specification ACT-100-U for External Corrosion Protection of Composite Steel Underground Storage Tanks
Steel Tank Institute Standard FLAMESHIELD for Aboveground Fire-Resistant Tanks
Steel Tank Institute Specification STI-P3 for External Corrosion Protection of Underground Steel Storage Tanks
Underwriter’s Laboratories Standard for Safety UL 58, Steel Underground Tanks for Flammable and Combustible Liquids
Underwriter’s Laboratories Standard for Safety UL 142, Steel Aboveground Tanks for Flammable and Combustible Liquids
Underwriter’s Laboratories Standard for SafetyUL 2085, Protected Aboveground Tanks for Flammable and Combustible Liquids