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Turnaround Handling Equipment for Refinery Maintenance

A refinery turnaround takes a process unit, or a group of units, out of service so that the inspection, cleaning, repair, and replacement work that cannot be done on stream can be done at once, and that compresses a large share of a plant's heavy handling into a single planned outage. UTEC Industrial designs, engineers, machines, fabricates, and installs custom material handling systems for aerospace and heavy industry from its Spokane Valley, WA facility, integrating Allen-Bradley PLC and motion control with in-house CNC machining, heat treating, and stress relief. This article works from the owner's turnaround plan: the process safety rules that govern contractors and changes, the confined-space, lockout, and rigging rules that shape the equipment, the documented refinery failures that expand turnaround scope, and the sensing and controls that let portable handling equipment behave predictably in a crowded unit. Turnaround equipment is designed and built along the same chain as any heavy handling system, design → engineering → parts machining → fabrication → assembly → weld fatigue → stress relief → drives → controls → tuning → monitoring, but it has to be finished, tested, and on site before the unit comes down.

Why does a turnaround concentrate so much heavy handling into one outage?​

A turnaround gathers the work that needs the unit shut down, and much of that work is driven by the mechanical-integrity element of OSHA's process safety management (PSM) standard. Paragraph 1910.119(j)(1) applies mechanical integrity to pressure vessels and storage tanks, piping systems including valves, relief and vent systems, emergency shutdown systems, controls, and pumps. Under (j)(4)(iii), inspection and test frequency follows manufacturers' recommendations and good engineering practice and increases where operating experience shows it is necessary, and under (j)(5), deficiencies outside acceptable limits are corrected before further use, or in a safe and timely manner when necessary means are taken to assure safe operation. Inspections that cannot be done on stream, and repairs that cannot be deferred, are scheduled into the outage.

The PSM standard names the turnaround explicitly. Paragraph 1910.119(h)(1) applies the contractor requirements to contractors performing maintenance or repair, turnaround, major renovation, or specialty work on or adjacent to a covered process, and excludes only incidental services that do not influence process safety, such as janitorial work, food and drink services, laundry, delivery, or other supply services. Riggers, crane crews, bundle-extraction crews, and the contractors who bring handling equipment onto the unit are inside that paragraph.

The handling consequence is volume under time pressure. Exchanger bundles, valves, relief devices, spools, vessel internals, and catalyst all move within the same weeks, often on the same deck, by several contractors at once (OSHA 29 CFR 1910.119-2026, §1910.119 paragraphs h.1, j.1, j.4.iii, and j.5).

Which PSM contractor rules govern the handling crew during a turnaround?​

Because a turnaround handling contractor falls under 1910.119(h)(1), both the owner and the contractor carry specific duties before the first lift. The owner, as the host employer, must:

  • Obtain and evaluate information on the contract employer's safety performance and programs when selecting a contractor, under (h)(2)(i).
  • Inform contract employers of the known potential fire, explosion, or toxic release hazards related to the contractor's work and the process, under (h)(2)(ii).
  • Explain the applicable provisions of the emergency action plan, under (h)(2)(iii).
  • Develop and implement safe work practices to control the entrance, presence, and exit of contract employers and contract employees in covered process areas, under (h)(2)(iv).
  • Periodically evaluate contractor performance, under (h)(2)(v), and maintain a contract employee injury and illness log related to the contractor's work in process areas, under (h)(2)(vi).

The contract employer, in turn, must assure that each contract employee is trained in the work practices necessary to perform the job safely, under (h)(3)(i), instructed in the known fire, explosion, or toxic release hazards and the emergency action plan, under (h)(3)(ii), and must document that each employee has received and understood the training, under (h)(3)(iii).

For handling equipment, the practical effect is that the machine arrives with its operators, its procedures, and its records. A bundle extractor or lifting device whose operators have not been trained on the unit's hazards, or whose rated load, test, and inspection records are not in hand, can be held at the gate by the owner's contractor controls regardless of how well it was built (OSHA 29 CFR 1910.119-2026, §1910.119 paragraphs h.1, h.2.i to h.2.vi, and h.3.i to h.3.iii).

How does the permit-required confined space standard shape handling inside vessels and exchanger shells?​

Much turnaround work happens inside columns, drums, reactors, and exchanger shells, and those are confined spaces under OSHA's definition: large enough to enter and work in, with limited or restricted means of entry or exit, and not designed for continuous occupancy. A confined space becomes a permit-required confined space when it has one or more listed characteristics, including a hazardous atmosphere or the potential for one. The standard defines a hazardous atmosphere to include flammable gas, vapor, or mist in excess of 10 percent of its lower flammable limit, and atmospheric oxygen below 19.5 percent or above 23.5 percent.

Several requirements govern equipment that works at or through a vessel opening:

  • Testing order. Under 1910.146(d)(5)(iii), atmospheric testing is done first for oxygen, then for combustible gases and vapors, and then for toxic gases and vapors.
  • Attendant. Paragraph 1910.146(d)(6) requires at least one attendant outside the permit space for the duration of entry operations.
  • Permit duration. Under (e)(4), the permit's duration may not exceed the time required to complete the assigned task or job identified on it.
  • Multiple employers. Paragraph (d)(11) requires procedures to coordinate entry when employees of more than one employer work in a permit space simultaneously, and (c)(8) requires the host employer to inform the contractor of permit spaces, hazards, and precautions.
  • Inerting. The standard notes that inerting, displacing the atmosphere with a noncombustible gas such as nitrogen, produces an IDLH oxygen-deficient atmosphere.

Handling equipment that lowers tools, trays, or internals through a manway, or lifts material out of a vessel, operates inside those rules. Its operation has to fit the permit, it cannot block the attendant's view or the entrant's exit, and loads moved over or into a manway have to be controlled so nothing falls into an occupied space (OSHA 29 CFR 1910.146-1993, §1910.146 paragraphs b, c.8, d.5.iii, d.6, d.11, and e.4).

What does confined-space retrieval require of lifting equipment at a manway?​

Rescue equipment is one of the places where turnaround handling and personnel safety meet directly. The permit-required confined space standard defines a retrieval system as the equipment, including a retrieval line, a chest or full-body harness, wristlets if appropriate, and a lifting device or anchor, used for non-entry rescue of persons from permit spaces.

Paragraph 1910.146(k)(3) requires retrieval systems or methods to be used whenever an authorized entrant enters a permit space, unless the retrieval equipment would increase the overall risk of entry or would not contribute to the rescue. The details matter for equipment design:

  • Attachment. Under (k)(3)(i), each entrant uses a chest or full-body harness with the retrieval line attached at the center of the back near shoulder level, above the head, or at another point that presents a profile small enough for successful removal.
  • Anchor and mechanical device. Under (k)(3)(ii), the other end of the line is attached to a mechanical device or fixed point outside the space so that rescue can begin as soon as the rescuer becomes aware it is necessary, and a mechanical device must be available to retrieve personnel from vertical-type permit spaces more than 5 feet (1.52 m) deep.
  • Openings. Where the alternate procedures of (c)(5)(ii)(B) apply, an opening left by a removed entrance cover is promptly guarded by a railing, temporary cover, or other barrier.

A davit, tripod, or lifting arm used at a vertical manway is therefore rescue equipment first. Custom handling frames that mount at a manway to lift trays or internals should be designed so that they do not occupy the anchor point or the clear path the retrieval system needs, and so that a rescue lift can start without first moving the handling equipment (OSHA 29 CFR 1910.146-1993, §1910.146 paragraphs b, c.5.ii.B, k.3.i, and k.3.ii).

How is lockout/tagout organized when many crews work the same unit?​

A turnaround puts many crafts under the same set of isolations, and the lockout standard has specific provisions for that. Paragraph 1910.147(f)(3)(i) requires crews, crafts, departments, or other groups doing servicing or maintenance to use a procedure that gives each employee a level of protection equivalent to a personal lockout or tagout device. Under (f)(3)(ii)(A), primary responsibility is vested in an authorized employee for a set number of employees working under the protection of a group lockout or tagout device, such as an operations lock, and (f)(3)(ii)(B) requires that employee to be able to ascertain the exposure status of each group member.

Two further provisions apply directly to a multi-contractor, around-the-clock outage:

  • Outside personnel. Under 1910.147(f)(2)(i), whenever outside servicing personnel are engaged, the on-site employer and the outside employer inform each other of their respective lockout or tagout procedures.
  • Shift changes. Paragraph 1910.147(f)(4) requires specific procedures during shift or personnel changes to ensure continuity of lockout or tagout protection, including the orderly transfer of protection between off-going and oncoming employees.

Handling equipment has to fit into that structure as a machine with its own energy sources. A hydraulic bundle extractor, a powered valve cart, or a portable hoist needs defined isolation points, and the standard is explicit that push buttons, selector switches, and other control-circuit-type devices are not energy isolating devices. Where stored energy can reaccumulate, as in a hydraulic circuit with an accumulator, (d)(5)(ii) requires verification of isolation to continue until the work is complete (OSHA 29 CFR 1910.147-1989, §1910.147 paragraphs b, d.5.ii, f.2.i, f.3.i, f.3.ii, and f.4).

Which rigging rules govern the volume of lifts in a turnaround?​

A turnaround can put a large sling inventory into service across many contractors at once, and the sling standard sets the inspection and identification rules that the rigging program has to keep up with:

  • Daily inspection. Under 1910.184(d), each day before use, the sling and all fastenings and attachments are inspected for damage or defects by a competent person designated by the employer, with additional inspections during use where service conditions warrant, and damaged or defective slings are removed from service immediately.
  • Periodic inspection of chain. Paragraph 1910.184(e)(3)(i) requires a thorough periodic inspection of alloy steel chain slings on a schedule based on frequency of use, severity of service, the nature of lifts, and service-life experience, at intervals no greater than once every 12 months, and (e)(3)(ii) requires a record of the most recent month in which each chain sling was thoroughly inspected.
  • Identification. Under (c)(14), slings without affixed and legible identification markings are not used, and under (c)(13), no sling is loaded beyond the safe working load on those markings.
  • Removal criteria. Synthetic web slings are removed from service for acid or caustic burns, melting or charring, snags, punctures, tears or cuts, broken or worn stitches, or distortion of fittings, under (i)(9). Wire rope slings are removed at ten randomly distributed broken wires in one rope lay or five in one strand in one rope lay, under (f)(5)(i).

With many contractors on site, the risk to manage is a sling that passes between crews without its identification or inspection history. Purpose-built lifting beams and fixtures with permanently marked rated loads, used for the recurring lifts such as bundle and valve handling, reduce the number of improvised sling configurations the program has to police (OSHA 29 CFR 1910.184-2019, §1910.184 paragraphs c.13, c.14, d, e.3.i, e.3.ii, f.5.i, and i.9).

What do the Tesoro and Chevron investigations say about turnaround scope?​

Two U.S. Chemical Safety and Hazard Investigation Board (CSB) investigations show how a documented failure mode turns into turnaround handling scope.

At Richmond, California, a release of flammable vapor on August 6, 2012 led to a fire at the Chevron refinery. The CSB identified sulfidation corrosion as the damage mechanism and addressed low-silicon carbon steel piping components, those not manufactured to ASTM A106 that may contain less than 0.10 weight percent silicon. It recommended that the American Petroleum Institute revise its sulfidation-corrosion guidance to require users either to inspect every component within an at-risk circuit once, which the CSB calls 100 percent component inspection, or to replace the at-risk carbon steel piping with a steel alloy more resistant to sulfidation corrosion. Either path multiplies the number of spools, fittings, and supports that are opened, removed, laid down, and replaced in an outage.

At Anacortes, Washington, a nearly forty-year-old heat exchanger failed catastrophically on April 2, 2010 during a maintenance operation to switch a process stream between two parallel banks of exchangers. The CSB found that the explosion resulted from high temperature hydrogen attack damage to the exchanger; seven employees were fatally injured. Its recommendations included prohibiting carbon steel in processes operating above 400 °F and above 50 psia hydrogen partial pressure.

For turnaround planning, both reports point the same way:

  • Scope follows damage mechanisms. A damage-mechanism review can add whole circuits or exchanger banks to the outage, and the handling plan has to scale with it.
  • Replacement material must stay traceable. Alloy-upgrade spools and replacement exchangers have to be kept distinct from removed parts through laydown and staging.
  • Live equipment sits beside the work. Parallel trains and adjacent units may be running while handling equipment works a few feet away.

The CSB also recommended applying inherently safer systems analysis and the hierarchy of controls, which in a turnaround means engineering the lift and the laydown rather than relying on procedure alone (U.S. Chemical Safety and Hazard Investigation Board, Chevron Richmond Refinery Pipe Rupture and Fire, 2015; U.S. Chemical Safety and Hazard Investigation Board, Tesoro Anacortes Refinery Fatal Explosion and Fire, 2014).

Which turnaround handling tasks justify custom-built equipment?​

Most turnaround lifts are done with mobile cranes and standard rigging, but a handful of recurring, heavy, or awkward tasks justify equipment built for the site. Typical candidates are:

  • Bundle extraction and insertion for removable-bundle exchangers, where pull force, bundle support, and alignment with the shell have to be controlled.
  • Lifting beams, spreaders, and dedicated fixtures for exchanger bundles, channel heads, large valves, and spools, which are below-the-hook lifting devices.
  • Valve-handling carts and turnover fixtures that move a valve from the line to a repair stand and turn it without re-rigging.
  • Manway-mounted handling frames for trays, internals, and tools, designed around the confined-space retrieval requirements.
  • Laydown and staging supports that keep removed and replacement components identified and off the deck steel they would overload.

Crane-suspended devices fall under ASME BTH-1-2023, the design standard for below-the-hook lifting devices, and ASME B30.20-2025, the safety standard for those devices. Equipment used at every turnaround, and at other outages in between, accumulates load cycles differently from equipment built for a single campaign, and its design basis should reflect the load cycles planned over its whole life (ASME BTH-1-2023; ASME B30.20-2025).

How should sensors, PLC logic, and interlocks be applied to portable turnaround equipment?​

Turnaround equipment is set up, used, moved, and set up again, often on a different exchanger or deck each time, so its controls have to confirm the setup as well as run the motion. A well-specified machine carries:

  • Load monitoring. Load cells or pressure transducers on lift and pull axes give the PLC a measured load, so it can block a lift above rated load and stop a pull whose force keeps rising.
  • Position and travel sensing. Encoders on travel, extraction, and slewing axes, backed by limit switches, let the machine slow on measured position instead of running to a hard stop.
  • Setup verification. Level sensing, outrigger or support-contact switches, and a confirmed configuration permissive keep the machine from moving until it is set up the way it was designed to be.
  • Zone interlocks. Gates or light curtains around the working envelope, tied to the permit area, hold motion while people are inside it.
  • Safety-rated control and drives. Safety functions run in a safety controller; Rockwell Automation rates a GuardLogix 5580 primary controller with a safety partner up to SIL 3 and PL e (Cat. 4), and GuardLogix controllers can exchange safety data with other CIP Safety devices over the network. Logix 5000 controllers organize code into continuous, periodic, and event tasks, so load and position checks can run at a fixed period. The Kinetix 5700 commissioning procedure includes a tuning step for each servo axis, and autotuned loop bandwidths can require adjustment once the motor and load are connected, so tuning is checked at each new setup with the real load.
  • Standards basis. ISO 12100:2010 covers risk assessment and risk reduction; ISO 13849-1:2023 covers the design of safety-related parts of control systems; IEC 60204-1:2016 covers the electrical equipment of machines.

Between turnarounds, logged drive faults, operating hours, load counts, and brake and cylinder cycles give the owner a condition record to act on before the next outage rather than during it. Each device on the machine also has to suit the area classification of every place it works. UTEC Industrial, a Rockwell Automation Recognized System Integrator, integrates Allen-Bradley PLC and motion control into the handling equipment it builds (Rockwell Automation 1756-RM012J-EN-P-2025; Rockwell Automation 1756-RM094N-EN-P-2025; Rockwell Automation 2198-UM002E-EN-P, Kinetix 5700; ISO 12100:2010; ISO 13849-1:2023; IEC 60204-1:2016).

What has to be closed out before the unit restarts?​

The end of a turnaround is governed as tightly as its start, and handling work shows up in several close-out steps. Under 1910.119(i)(1), a pre-startup safety review is performed for new facilities and for modified facilities when the modification is significant enough to require a change in the process safety information. Paragraph 1910.119(i)(2) requires the review to confirm, before highly hazardous chemicals are introduced, that construction and equipment are in accordance with design specifications and that safety, operating, maintenance, and emergency procedures are in place and adequate.

Change control and training follow the same timeline:

  • Management of change. Paragraph 1910.119(l)(1) requires written procedures to manage changes, except replacements in kind, to process chemicals, technology, equipment, and procedures, and changes to facilities that affect a covered process.
  • Training before start-up. Under (l)(3), operating, maintenance, and contract employees whose job tasks are affected by a change are informed of, and trained in, the change before start-up of the process or the affected part of it.
  • Inspection records. Under (j)(4)(iv), each inspection and test is documented with the date, the inspector, the equipment's serial number or other identifier, a description, and the results.
  • Installation checks. Paragraph (j)(6)(ii) requires checks and inspections to assure that equipment is installed properly and consistent with design specifications and the manufacturer's instructions.
  • Release from lockout. Under 1910.147(e), before lockout or tagout devices are removed and energy is restored, the work area is inspected to ensure that nonessential items have been removed and that components are operationally intact.

Temporary handling equipment is part of that clean-up. Anything clamped to a structure, a temporary support left under a spool, or a handling frame left at a manway is a nonessential item until it is removed and recorded (OSHA 29 CFR 1910.119-2026, §1910.119 paragraphs i.1, i.2, j.4.iv, j.6.ii, l.1, and l.3; OSHA 29 CFR 1910.147-1989, §1910.147 paragraph e.1).

How should custom turnaround equipment be planned, built, and tested ahead of the outage?​

Turnaround dates are fixed long in advance, so custom handling equipment has to run the whole build chain early enough to be tested and accepted before mobilization. Working back from the start of the outage, the plan typically covers:

  • Design and engineering: the lifting-device classification, rated loads for each component it will handle, the load path, the area classification of each work location, and the controls and safety functions.
  • Machining and fabrication: pulling heads, pin bores, attachment points, and the welded frame, with weld details matched to the expected load cycles.
  • Stress relief and inspection: stress relief of primary welded structures where the design calls for it, followed by NDT and dimensional inspection.
  • Drives, controls, and tuning: panel build, programming, and tuning with representative loads.
  • Acceptance: rated-load marking and load testing, which fall under the marking and testing provisions of B30.20-2025, and a factory acceptance test of motion, force limits, interlocks, and stops.
  • Site readiness: operator training that satisfies the contractor's training duty under 1910.119(h)(3), and the lockout, inspection, and test records the owner's contractor controls will ask for at the gate.

The customer's own procurement rules can also apply. Paragraph 1910.119(j)(6)(iii) requires the employer to assure that maintenance materials, spare parts, and equipment are suitable for the process application for which they will be used, which reaches any support, fixture, or part left in the process. UTEC Industrial performs factory acceptance testing and on-site commissioning, so the acceptance criteria can be written into the purchase order and demonstrated before the equipment ships to the site (OSHA 29 CFR 1910.119-2026, §1910.119 paragraphs h.3 and j.6.iii; ASME B30.20-2025).

What should the owner's turnaround handling specification contain?​

A turnaround handling specification that lists only capacities and reaches leaves out most of what decides whether the equipment can be used on the unit. A complete specification defines:

  • Components and loads: every bundle, valve, spool, and internal the equipment will handle, with weights, dimensions, and centers of gravity from manufacturer data or weighed lifts.
  • Locations: decks, structures, pipe racks, manways, and laydown areas, with their load capacities, clearances, and area classifications.
  • Permits and interfaces: the hot work, confined space, and line-breaking permits the tasks need, and how the equipment interfaces with confined-space retrieval under 1910.146(k)(3).
  • Energy control: the machine's isolation points, blocking positions, and stored-energy relief, and how it fits the owner's group lockout procedure under 1910.147(f)(3).
  • Rigging program: permitted sling types, identification, and inspection records under 1910.184(d) and (e)(3).
  • Controls and safety: sensing, interlocks, safety functions, and the controller platform the site standardizes on.
  • Records and acceptance: lifting-device classification, rated-load marking, load test, fabrication and inspection records, and factory acceptance results.

OSHA's refinery findings show that change control is cited as well as hardware: National Emphasis Program citations for management of change covered changes in equipment design, operating procedures, maintenance and repair, facilities, and excessive time limits on temporary changes (OSHA 29 CFR 1910.146-1993, §1910.146 paragraph k.3; OSHA 29 CFR 1910.147-1989, §1910.147 paragraph f.3; OSHA 29 CFR 1910.184-2019, §1910.184 paragraphs d and e.3; OSHA 3918-08, 2017, p. 25).

Related Articles

References​

  • OSHA 29 CFR 1910.119-2026: Process Safety Management of Highly Hazardous Chemicals. U.S. Department of Labor, 2026.
  • OSHA 29 CFR 1910.146-1993: Permit-Required Confined Spaces. U.S. Department of Labor, 1993.
  • OSHA 29 CFR 1910.147-1989: The Control of Hazardous Energy (Lockout/Tagout). Occupational Safety and Health Administration, 1989.
  • OSHA 29 CFR 1910.184-2019: Slings. U.S. Department of Labor, 2019.
  • U.S. Chemical Safety and Hazard Investigation Board. Chevron Richmond Refinery Pipe Rupture and Fire. Investigation Report No. 2012-03-I-CA, 2015.
  • U.S. Chemical Safety and Hazard Investigation Board. Tesoro Anacortes Refinery Fatal Explosion and Fire. Investigation Report, 2014.
  • ASME BTH-1-2023: Design of Below-the-Hook Lifting Devices. ASME, 2023.
  • ASME B30.20-2025: Below-the-Hook Lifting Devices. ASME, 2025.
  • Rockwell Automation 1756-RM012J-EN-P-2025: GuardLogix 5580 and Compact GuardLogix 5380 Controllers Safety Reference Manual. Rockwell Automation, 2025.
  • Rockwell Automation 1756-RM094N-EN-P-2025: Logix 5000 Controllers Design Considerations. Rockwell Automation, 2025.
  • Rockwell Automation 2198-UM002E-EN-P (2018): Kinetix 5700 Servo Drives User Manual. Rockwell Automation, 2018.
  • ISO 12100:2010: Safety of machinery — General principles for design — Risk assessment and risk reduction. ISO, 2010.
  • ISO 13849-1:2023: Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design. International Organization for Standardization, 2023.
  • IEC 60204-1:2016 (Ed. 6.0): Safety of Machinery -- Electrical Equipment of Machines -- Part 1: General Requirements. International Electrotechnical Commission, 2016.
  • OSHA. Process Safety Management for Petroleum Refineries: Lessons Learned from the Petroleum Refinery Process Safety Management National Emphasis Program. OSHA 3918-08, U.S. Department of Labor, 2017.

Ready to Discuss a Material Handling System?​

UTEC Industrial designs, engineers, machines, fabricates, and installs custom material handling systems for heavy industry, from the stress-relieved structure and drives to the Allen-Bradley PLC controls, tuning, and monitoring that run them, at its Spokane Valley, WA facility. Send UTEC the application, loads, and duty cycle to start a system review.

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