API 650, Storage Tank, bottom plate, basic weld sequence. स्टोरेज टैंक बॉटम प्लेट वेल्डिंग

Introduction

This tutorial provides a step-by-step guide on the basic welding sequence for the bottom plate of a storage tank, as demonstrated in the Technical Studies video. Understanding this process is essential for fitters and welders in the oil and gas industry, as proper welding techniques ensure the structural integrity and safety of storage tanks.

Step 1: Prepare the Work Area

• Clear the Area: Ensure that the workspace is free of debris and obstructions.
• Gather Tools and Materials: Collect all necessary welding equipment, including:
  • Welding machine
  • Electrodes
  • Safety gear (gloves, helmet, protective clothing)
  • Measuring tools (tape measure, level)
• Check Equipment: Inspect all tools for functionality and safety compliance.

Step 2: Layout the Bottom Plate

• Position the Plate: Place the bottom plate on a stable surface.
• Measure and Mark: Use the measuring tools to mark the positions where the weld will be applied.
• Verify Dimensions: Double-check that all measurements align with project specifications.

Step 3: Cleaning the Plate

• Remove Contaminants: Clean the bottom plate thoroughly to remove rust, oil, and dirt, which can affect welding quality.
• Use a Wire Brush: A wire brush can effectively clean the edges where welding will occur.

Step 4: Set Up the Welding Machine

• Adjust Settings: Based on the material and thickness of the plate, set the appropriate voltage and amperage on the welding machine.
• Select the Right Electrode: Choose an electrode that is compatible with the materials being welded.

Step 5: Execute the Welding Sequence

• Start the Weld: Begin welding at one edge of the bottom plate. Follow these tips:
  • Use a consistent speed to avoid burn-through or incomplete welds.
  • Maintain a steady hand to ensure even bead formation.
• Follow a Pattern: Use a zigzag or circular motion, depending on your technique and material.
• Check Weld Quality: After each pass, inspect the weld for consistency and quality.

Step 6: Cool Down and Inspect

• Allow to Cool: Let the welded area cool naturally to avoid warping.
• Conduct Visual Inspection: Look for any defects such as cracks or incomplete fusion.
• Perform NDT if Required: Non-Destructive Testing (NDT) may be necessary to ensure the weld's integrity.

Conclusion

Welding the bottom plate of a storage tank requires careful preparation, execution, and inspection to ensure safety and reliability. By following these steps, welders can achieve high-quality results. For further learning, consider exploring additional resources or tutorials on advanced welding techniques and safety practices.