AR Boiler Operator cheat sheet

External inspection: covers shell, fittings, piping, insulation, supports, and accessible safety devices without opening the boiler.

Internal inspection: requires the boiler to be cooled, drained, opened, and cleaned so shell, tubes, sheets, and stays can be examined.

Hydrostatic test: boiler filled with water and pressurized to the required test pressure; used when visual inspection cannot resolve strength questions.

Inspection certificate records the maximum allowable working pressure (MAWP) established by the inspector, not the relief valve setting alone.

Ultrasonic thickness testing is used to evaluate wall loss from corrosion or erosion when surfaces are pitted or scaled.

Inspectors look for caustic embrittlement, grooving, cracking at staybolts, and ligament cracks between tube holes.

Safety valve test lever must be lifted during inspection to confirm the valve opens freely and reseats.

A boiler with a defective safety valve or low-water fuel cutoff is not eligible for a certificate until repaired and reinspected.

Operating a boiler without a valid certificate of inspection where one is required is a violation enforceable by the state boiler authority.

Boiler operator licenses are issued by grade/class and authorize operation only of boilers within that class's size or pressure limits.

License renewal typically requires documented continuing education hours and payment of a renewal fee before expiration.

New installations require an installation permit and a plan review before construction or relocation begins.

Certificate of inspection is posted at or near the boiler and is available for review by the inspector on arrival.

Operating a boiler outside the scope of the operator's license grade can result in suspension or revocation of the license.

Repairs to pressure-retaining parts require approval of the inspector and use of qualified welders with documented procedures.

MAWP is calculated from shell thickness, diameter, joint efficiency, and allowable stress using the applicable ASME code formula.

Longitudinal seam joint efficiency depends on the type of welded or riveted joint; higher efficiency permits higher MAWP for the same thickness.

Staybolts support flat surfaces; their size, spacing, and pattern are governed by code rules for stayed surfaces.

Safety valve capacity must equal or exceed the boiler's maximum steaming capacity at MAWP.

Boiler shells are built from steel plate with welded longitudinal and circumferential seams; riveted construction appears in older units.

Handhole and manhole openings require reinforcement when they remove metal from a pressure-retaining surface.

Tube sheets, tubes, and firebox sheets are pressure parts; their thickness and support determine allowable pressure.

Nameplate data includes MAWP, design pressure, heating surface, and manufacturer; it must match the certificate records.

Boilers must be set level with adequate clearance for inspection, cleaning, and access to safety devices and fittings.

Steam and water connections must include required valves, check valves, and drains arranged so the boiler can be isolated.

Safety valve discharge piping must be independent, unobstructed, and drain freely so no back pressure builds on the valve.

Repairs by welding on pressure parts require qualified welders, approved procedures, and post-repair inspection or testing.

After major repairs, a hydrostatic test at the required pressure is performed before the boiler is returned to service.

Combustion air supply and venting must be sized for the burner input; inadequate air causes incomplete combustion and CO.

Refractory, insulation, and casing must be reinstalled so the boiler is not left with hot spots or exposed pressure parts.

Inspector notification is required before covering up concealed work on pressure parts so it can be examined.

Low-water fuel cutoff must be tested by evaporating or draining water to the cutoff level and confirming burner shutdown.

Safety valve setting is the boiler's maximum allowable working pressure; the valve must open at or below that setting.

Try cocks and gauge glass are used to verify water level; the gauge glass must be blown down to confirm it is not plugged.

Bottom blowdown removes sludge and sediment; it is done with the boiler at low fire and the water level watched closely.

Water column and gauge glass connections must be kept clear; a clogged connection gives a false water level reading.

High-pressure and high-temperature limits, flame scanners, and combustion safeguards are tested per the manufacturer's schedule.

Feedwater treatment controls scale, corrosion, and carryover; blowdown frequency is set by tested water chemistry.

A boiler with a tripped low-water cutoff must not be restarted until the cause is found and water level is restored.

The Arkansas Boiler Safety Act is administered by the state boiler inspection authority within the labor department.

Boilers must be inspected at the intervals set by rule; the certificate of inspection is issued only after a satisfactory inspection.

The inspector may order a boiler taken out of service when it is unsafe, and operation after that order is prohibited.

Rules adopt recognized codes such as ASME for construction and NBIC for repairs and alterations.

Owner/operator must report accidents, explosions, or serious injuries involving a boiler to the authority.

Operating without a required certificate or license is subject to penalties under the Act.

Exemptions from the Act are limited and defined by rule; operators should confirm applicability rather than assume exemption.