We are a top‑rated welding company in Kansas City, MO, dedicated to keeping your piping systems safe and code‑ready.

Our welding company in Kansas City, MO, ensures timely backflow preventer testing, detailed documentation, and leak‑free repairs. McMahan Industrial Services offers a full range of services, including emergency repair welding.

Backflow Preventer Inspection Overdue

When a backflow preventer inspection is overdue, cross-connection contamination can occur, undermining potable-water integrity and violating local plumbing codes and utility requirements. NFPA 70 and OSHA 29 CFR 1910.151 expect effective maintenance and hazard control; many jurisdictions require testing by a licensed backflow tester at defined intervals (commonly annually). Additionally, ensuring sanitary equipment fabrication solutions is crucial to maintaining overall safety in water systems.

Inspection and Remediation Framework

1. Verify model/type, install date, last test result, and water pressure/temperature ratings.

2. Perform functional testing per ASSE 1013/1015 and applicable local code; document differential pressure and relief discharge performance.

3. If leakage or failed test is found: isolate, tag out, replace/check check valves, O-rings, seats, and shutoff valves, then retest.

Required Documentation Control

Maintain test reports, calibration references, and corrective-action logs with timestamped signatures for audit traceability.

Scope and Risk Controls for Threaded Black-Pipe Replacement

Threaded black-pipe replacement addresses leakage, corrosion, and improper mechanical integrity. Pre-task controls: verify pressure is zero, lock out/tag out per OSHA 1910.147, and confirm material specs using ASTM A53/A106 grade markings.

Procedure: Measurement—Cut—Thread—Seal—Verify

1. Measure run and fittings; confirm bore/OD with field calipers.

2. Cut pipe square; deburr to preserve thread engagement (typically 1–3 full turns for NPT).

3. Re-thread to manufacturer tolerances; inspect thread gauge ring fit.

4. Apply a sealant system compatible with the service: PTFE tape or pipe dope; avoid over-application that can restrict flow.

5. Reassemble and torque to fitting manufacturer guidance.

6. Pressure test after installation per applicable code (commonly hydrostatic per ASME B31.3).

Acceptance Criteria

Leak-free condition under test pressure; no thread damage, extrusion, or gasket bypass. Document results, materials, and test values.

Why Hydrostatic Testing-Ready Repairs Fail

Hydrostatic testing exposes defects in welds, threaded joints, and pipe fittings via pressure retention and leak detection; premature corrosion or improper heat input can mask or worsen flaws.

For repairs to be test-ready, procedures must control PWHT when required, surface cleanliness, and joint geometry consistency.

Repair Workflow to Meet Testability Requirements

1. Verify material & WPS: Match pipe grade to ASTM A53/A106 and weld procedure per ASME IX.

2. Control welding parameters: Document preheat/interpass temperature; prevent undercut and lack of fusion.

3. Prepare threads/seals: Use approved thread engagement and rated sealant; pressure-tight must be demonstrated.

4. Isolate/test safely: Follow OSHA 29 CFR 1910 (pressurized systems).

Affordable Welding Company In Kansas City MO!

If you’re looking for an affordable welding company in Kansas City, MO that still delivers dependable results for piping systems, repairs, and custom fabrication, McMahan Industrial Services is ready to help.

We provide mobile welding, pipe fitting and repair, and structural welding with a focus on safety, integrity, and getting your team back up and running quickly. Call us today at 877-731-3193 or email akiger@mcmahanindustrial.com for a quote or to discuss your project.

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Explore Kansas City, MO Attractions

What should people do after work in Kansas City, MO, when the day feels done but the fun isn’t? We can plan a sparkling night out, then return to the jobsite knowing piping stays safe. Attractions help you reset, like the Country Club Plaza lights, a riverfront stroll, and barbecue with friends. To add depth, we suggest:

1. Visit the plaza.

2. Walk the Power & Light District,

3. Catch a game downtown.