Ensuring Safety, Efficiency & System Longevity
Steam piping powers turbines, supports process heat, and keeps environmental controls stable. Over years of high temperature, pressure cycling, and condensation, even well-built systems can lose performance—or fail. A disciplined maintenance program prevents costly downtime, protects people, and preserves energy efficiency.
Bunney’s Inc. maintains, tests, and repairs steam piping for power, water, and industrial facilities across Arizona and the Southwest, with procedures aligned to code and site standards.
New to Bunney’s? Learn who we are and explore our capabilities.
Why Proactive Steam Maintenance Matters
-
Safety first: High-pressure steam can cause serious injury and equipment damage. Early leak detection and valve service reduce risk.
-
Energy savings: Insulation loss and trap failures waste fuel. Tight systems cut energy use and emissions.
-
Reliability: Routine inspections reduce unplanned outages and stabilize steam delivery.
-
Compliance: Documentation and testing support ASME, OSHA, and owner requirements.
Core Maintenance Components
1) Visual Walkdowns
Identify corrosion, leaks, damaged lagging, missing nameplates, and signs of water hammer. Verify labeling/flow arrows and accessibility for isolation.
2) Nondestructive Testing (NDT)
Use UT thickness, RT/UT of welds, PT/MT for surface flaws, plus borescope where access is limited. Trend readings to forecast replacement.
3) Valve & Actuation Service
Exercise, lubricate, packings/gaskets, calibration of control valves, and stroke testing for responsiveness and tight shut-off.
4) Insulation & Heat Loss Control
Repair jacketing and wet insulation. Re-insulate to spec to protect personnel, prevent condensate formation, and improve efficiency.
5) Supports, Guides & Anchors
Check spring cans, snubbers, hangers, and guide gaps. Correct sag/misalignment to avoid overstress at welds and flanges during thermal growth.
6) Drainage & Condensate Management
Audit steam traps (ultrasonic/temperature checks), check drip legs, strainers, and low points. Fix failed-open/closed traps to stop water hammer and energy loss.
7) Corrosion Protection
Seal leaks quickly, maintain protective coatings, and address chemistry issues (oxygen scavenging/condensate pH) with the plant team.
Recommended Maintenance Cadence
-
Daily/Shift: Operator rounds (leaks, noises, hammer, insulation damage)
-
Quarterly: Trap surveys, valve exercising, relief valve visual checks
-
Semiannual: UT spot checks, support/hanger inspection, PRV functional tests per site policy
-
Annual/Outage: Expanded NDT, weld inspections, hot-torque/controlled bolting checks, insulation refurbishment, P&ID reconciliation
(Cadence adjusts by service criticality, hours of operation, and past findings.)
KPIs to Track
-
Steam loss rate / lb steam per MWh or per unit output
-
Trap failure rate (% failed open/closed)
-
Heat loss index (W/ft) by area
-
Leak MTTR & recurrence
-
Thickness loss rate (mpy) at monitored locations
-
Unplanned outage hours linked to steam system
Arizona-Specific Considerations
Extreme heat, dust, and monsoon humidity influence maintenance priorities:
-
UV-resistant jacketing and weather-tight cladding for outdoor runs
-
Insulation and shielding for personnel protection in high-ambient zones
-
Dust control at moving components and valve stems
-
Thermal expansion detailing for large daily temperature swings
-
Water chemistry attention for boiler/condensate systems in arid conditions
Standards & Documentation
Work is planned and recorded to align with:
ASME B31.1/B31.3, applicable API/ASTM tests, OSHA/site safety rules, and owner specifications. Turnover packages include inspection reports, NDT results, torque records, and updated isometrics where required.
Why Choose Bunney’s Inc.
-
Decades of steam system experience in power, water, and manufacturing
-
End-to-end support: surveys, NDT, repairs, valve service, insulation, and documentation
-
Outage & emergency response with disciplined scheduling and QA/QC
-
Safety-first culture with site-specific training and permits
FAQs
How often should we test steam traps?
At least annually, with quarterly spot checks in high-loss areas. Critical services may justify continuous monitoring.
What’s the quickest win for energy savings?
Repair insulation and fix failed-open traps—these two actions typically deliver the fastest, measurable fuel reductions.
How do we know if water hammer is occurring?
Listen for sharp bangs/vibration, inspect for loosened supports, and review trap/drip leg placement. We can instrument lines to confirm transient pressure spikes.
Which code applies to my system—B31.1 or B31.3?
Power-plant steam typically falls under ASME B31.1; process plants often follow B31.3. We review service and owner specs to apply the correct standard.
Can maintenance be performed while online?
Many tasks (inspections, trap checks, insulation repairs) can proceed under controlled conditions. Higher-risk scopes are scheduled during planned outages.
