Proof from work performed in place

Hot Tapping / Line Stopping

36 in. Hot Tap & Line Stop

Hot tap and line stop on a live crude-oil transfer line at an offshore Gulf repump station, holding isolation through the repair window without taking the transfer system down.

Representative professional experience — performed by ES&C leadership prior to founding ES&C, while employed by another service provider. Not an ES&C contract.

Challenge

A crude-oil transfer line at an offshore Gulf repump station required work that normally means draining and depressurizing the system — an outage the transfer duty could not absorb.

Scope

Fitting review and installation, hot tap either side of the work area, line stop isolation for the duration of the repair window, then completion and plugging of the fittings.

Execution

Tapping machine and line stop housings were rigged in place with the system in service. The full-diameter coupon was retained on the pilot cutter and recovered intact, then stopping heads were set and isolation held while the work proceeded.

Technical result

Isolation was maintained across the full work window on the live 36 in. crude line and the transfer system returned to service without an unplanned shutdown.

Hot Tapping

8 in. Hot Tap on a Live Natural-Gas Line

An 8 in. hot tap performed on a live natural-gas line, allowing a new tie-in to be established while the line stayed in service.

Challenge

A new connection was needed on a natural-gas line that could not be taken out of service, with the tap location only reachable from above.

Scope

Fitting and valve installation, pressure test, vertical hot tap through the full-port valve, coupon recovery and machine removal.

Execution

The tapping machine was rigged vertically from a boom lift and advanced under controlled feed with the line live, monitoring pressure throughout the cut.

Technical result

The 8 in. coupon was recovered intact in the pilot cutter and a finished branch connection was left in service with no interruption to gas flow.

Field Machining

8 in. Class 600 Cryogenic PSV — Gasket Surface Repair

A new 8 in. Class 600 cryogenic PSV required gasket-surface correction ahead of scheduled testing the following morning. ES&C mobilized portable field-machining equipment to the site and resurfaced the gasket sealing area as required, supporting the customer's time-critical test schedule.

Challenge

A new 8 in. Class 600 cryogenic pressure safety valve had a gasket sealing surface that was not acceptable for service, and the valve was scheduled for testing the following morning — leaving no time to route the component through a shop.

Scope

Same-day mobilization with portable field-machining equipment, set-up on the valve, and resurfacing of the gasket sealing area as required so the valve could proceed toward its scheduled testing.

Execution

The portable machining equipment was mounted and indicated to the valve, and the gasket sealing surface was machined in place with cut depth controlled to address the unacceptable condition only.

Technical result

The gasket sealing surface was resurfaced in the field overnight and the valve was released back to the customer in time for the scheduled morning test, avoiding shop turnaround and schedule loss.

Stage 1 — Gasket sealing surface condition / pre-repair inspection

Close-up documentation of the as-found gasket sealing surface on the new 8 in. Class 600 cryogenic PSV before any machining.

Photo slot reserved

Awaiting owner-approved photography for this stage. No image is shown for this stage until authentic project media is provided.

Stage 2 — Portable field-machining equipment mounted and resurfacing operation

Portable field-machining equipment mounted and indicated to the valve, and the resurfacing pass across the gasket sealing area.

Stage 3 — Repaired / resurfaced gasket sealing surface

The finished gasket sealing surface after in-place resurfacing, prior to the valve being released back to the customer.

Field Machining

Pressure Drum Repair

Field repair of a pressure drum: field machining equipment mounted in place to resurface the gasket sealing area and return the vessel to service.

Challenge

A pressure drum had a degraded gasket surface that would not hold a seal, with shipment of the vessel to a machine shop ruled out on cost and schedule.

Scope

Mounting of portable flange facing equipment in place, machining of the vessel gasket sealing area, and verification of surface condition and finish.

Execution

A portable flange facing machine was mounted directly to the vessel and the facing head tracked the gasket surface across the full bolt circle, with cut depth controlled to remove damage only.

Technical result

The gasket sealing area was resurfaced in place to a uniform, seal-ready finish with machining values recorded, and the drum was returned to service.

Field Machining / Valve Work

20 in. Class 150 Gate Valve

Gate-valve work on a 20 in. Class 150 system, including flange facing, seat condition assessment and reassembly.

Challenge

A 20 in. Class 150 gate valve needed its gasket surface and seat addressed, but sending the valve out would have extended the outage well past the available window.

Scope

In-place set-up on skids, flange facing of the valve body gasket surface, seat condition assessment and seat restoration, then reassembly.

Execution

A portable facing machine was mounted to the valve body and the feed screw and rotating arm tracked the gasket face while the seat was assessed and restored.

Technical result

Gasket surface and seat were returned to serviceable condition without shipping the valve out, keeping the outage inside its planned duration.

Field Machining

API 610 VS1 Vertical Turbine Pump / Sump Can Correction

In-place machining of the top mounting surface of an API 610 VS1 vertical turbine pump sump can, found 0.125 in. out of level to the world.

Challenge

The sump can / pump mounting surface of an API 610 VS1 vertical turbine pump arrangement was found 0.125 in. out of level to the world, and the can could not be removed for shop repair.

Scope

Mount and indicate a portable facing machine on the sump can and machine the top mounting surface in place to restore the required level condition for the vertical turbine pump.

Execution

The facing machine was set directly on the sump can and the cut was taken across the top mounting surface, correcting the measured out-of-level condition without removing the can.

Technical result

The sump can mounting surface was found 0.125 in. out of level to the world. Field machining was performed on the top mounting surface of the sump can to correct the mounting condition and support proper alignment of the API 610 VS1 vertical turbine pump.

Field Machining — Marine

Field Machining — Valve Seats

In-place valve seat machining on large-bore marine engine cylinder heads, recovering sealing performance without replacing the seat inserts.

Challenge

Large-bore marine engine cylinder heads had worn valve seats, and replacing the inserts would have meant longer downtime and greater cost than the condition warranted.

Scope

Set-up over the cylinder head, indication off the valve guide bore, machining of seat angles and counterbores, then seat checks against specification.

Execution

A portable machining unit was indicated off the guide bore so seat angles and counterbores were cut concentric to the guide, with dial indicator and gauges used to verify each seat.

Technical result

Seats were returned to specification with the original inserts retained, restoring sealing performance on the heads.

Field Machining

Sandwich-Valve Machining

Machining of sandwich-valve sealing faces to restore fit and function within an existing piping arrangement.

Challenge

Sandwich-valve sealing faces had lost fit within a fixed piping arrangement that offered very little working clearance and no room to change the layout.

Scope

Access assessment, tooling selection for the confined set-up, machining of the sealing faces and verification of fit on reassembly.

Execution

Compact portable tooling was set up within the available clearance and the sealing faces were machined without disturbing the surrounding spool arrangement.

Technical result

Fit and sealing function were restored inside the existing arrangement, avoiding a piping modification.

Technical Consulting

Taper Lock Heat-Exchanger Transition — Latin America

Technical consulting in Latin America supporting a Taper Lock heat-exchanger transition, covering method, tooling and execution sequence.

Challenge

An operator moving heat-exchanger closures to a Taper Lock arrangement needed a defensible method, the right tooling and a disassembly and reassembly sequence the site crew could execute.

Scope

Method development, tooling selection, disassembly sequence, reassembly and make-up criteria, and on-site technical oversight for the in-country engagement.

Execution

Work was supported on site through the transition window, including inspection of exchanger cover make-up and controlled make-up support during reassembly.

Technical result

The transition was executed to an agreed method with make-up criteria defined and verified on site.

Industrial Painting & Protective Coatings

ALCO V16 Marine-Engine Coating

Surface preparation and a multi-coat protective system applied to an ALCO V16 marine engine for corrosion protection in a marine environment.

Challenge

An ALCO V16 marine engine required corrosion protection without coating sealing faces, instrumentation or fasteners that had to stay clean for reassembly.

Scope

Full surface preparation, masking of sealing faces, instrumentation and fasteners, then primer and topcoat across the engine banks.

Execution

Cylinder head covers and valve gear were masked before preparation, and the engine was coated on its transport frame with primer and finish coat applied bank by bank.

Technical result

A multi-coat protective system was applied across the engine with sealing and instrumentation surfaces preserved for reassembly.