Total Welding & Contracting Inc

03/26/2026

4 - 8" 4 - 6" hottaps .
Text or call 202-439-2524
We can tap any pipe system with out shutting the system down . Live gas any liquids.
All work is done in house. One shop stop .

03/26/2026

8" Hottaps
Tempary chiller hook up .

10/10/2025

The bumper is officially called a rear impact guard or rear underride guard, but is commonly known as a Mansfield bar after Jayne Mansfield, who died in a 1967 accident where her car slid under a trailer. Its purpose is to prevent passenger cars from sliding underneath the trailer in a rear-end collision, minimizing severe injury and death to car occupants

08/13/2025

WHAT IS THE MINIMUM DISTANCE BETWEEN WELDS🤔

👉The minimum distance between welds depends on the type of weld, the materials being joined, the applicable code or standard, and the service conditions (e.g., pressure, temperature, fatigue). However, here’s a general guideline:

🔧 General Rule of Thumb

For butt welds on piping and pressure vessels:

Minimum distance between adjacent circumferential welds (center to center):

🔹 1.5 × the pipe wall thickness, or
🔹 Not less than 25 mm (1 inch)

Whichever is greater

🛠 Applicable Standards

Here’s what some codes say:

1. ASME B31.3 (Process Piping)
• Paragraph 328.5.4:
Welds on adjacent piping joints should be separated by at least one pipe diameter, but not less than 25 mm, unless a closer spacing is justified.

2. ASME Section VIII (Pressure Vessels)
• For pressure parts, weld spacing should ensure no overlap of heat-affected zones (HAZ).
• If welds are too close, stress concentration and metallurgical issues may arise.

3. API 650 (Storage Tanks)
• For shell courses, minimum distance is 100 mm (4 inches) between horizontal and vertical welds.

❗️Why Spacing Matters:
• Prevents overlapping HAZ that weakens the material.
• Allows proper NDT (Non-Destructive Testing) access.
• Avoids residual stress accumulation and cracking.

📌 In Summary:

Condition Minimum Weld Spacing
General piping 1.5× wall thickness or 25 mm
Per ASME B31.3 ≥ 1× pipe diameter or ≥ 25 mm
API 650 (Tank). ≥ 100 mm (4 inch)
If unavoidable Engineering review & stress
analysis may be required

08/13/2025

Hot taps
2 - 6" on 6" main
2 - 3" on 4" main

07/31/2025

8" Gas pipe .

07/31/2025

2" live gas stop
James Knotts

Mr J sent you a Snap on Snapchat!

07/30/2025

4 - 1" hot taps on live gas main . 16" of space .

06/18/2025

Two 4" Hottaps for new hvac equipment.
We can tap into any live system with out shutting the system down , gas oil , fuel , chill water , steam , sewer water mains . ¼ to 12"
We also do line stops ½ to 4"
Pipe freezing ½ to 4" larger sizes comming soon
Www.totalweld.com
[email protected]
Mechanical Contractors Association of Maryland, Inc.

06/06/2025

Pump truck repairs

05/29/2025

This is a 10 pound bar of stainless steel, worth around just $40 in its raw form.

Turn it into horseshoes, and its value rises to around $400.

Craft it into medical needles, and it becomes worth more than $40,000.

Shape it into watch springs and gears, and its value soars to more than $400,000.

But refine it into high-tech laser components used in computer chips, and that same bar is suddenly worth millions. 💵 💵 💵

Your true worth isn't defined by what you're made of - but by how you develop your skills and apply them.

Remember friends it’s not rather a glass is half full or half empty, it’s to always remember the glass is refillable. Go to where you get filled up and can fill up those around you!