Heater Specialist

What Heater Specialist does

HSI LLC (operating as Heater Specialist / HSI) is a privately-held, US-incorporated industrial fabrication company founded in 1988 and headquartered in Tulsa, Oklahoma. The company designs, engineers, and manufactures custom process equipment — including pressure vessels, columns, towers, reactors, regenerators, fired heaters, storage tanks, transfer lines, and orifice chambers — for the oil refining, chemical process, power generation, petrochemical, and emerging renewable/syngas industries. HSI positions itself as a fully integrated single-source manufacturer, retaining in-house capability across engineering, fabrication, refractory planning and installation, industrial coating, quality control, and multi-modal transportation, supported by 342,000 sq. ft. of indoor manufacturing space, 100 acres of outdoor assembly space, and a strategic location near the Port of Catoosa for heavy-haul logistics.

The company's underlying technology stack is built around traditional heavy fabrication augmented by an integrated robotic welding and cutting division, in-house design and detailing performed by full-time engineers, and a refractory installation capability that is performed internally rather than outsourced to third parties. Its competitive pitch centers on adaptive innovation for complex project constraints, single-source responsibility to reduce coordination overhead, and the ability to deliver any size project globally via truck, barge, and rail. HSI expanded its footprint in 2024 through the acquisition of ParFab Industries Inola Facilities, which brings additional fabrication, refractory, and coating capabilities serving petrochemical, refining, renewable, syngas, and energy end-markets.

HSI makes money through project-based, quote-driven contracts for custom fabrication work. Pricing is not publicly disclosed and is determined per engagement based on specifications, scope, materials, and requirements, with multi-year contract cadence typical for large industrial projects. The go-to-market model is direct enterprise field sales targeting industrial buyers, supported by an inbound contact channel through the company website ([email protected] / (918) 835-3126). No public listing, parent entity, or external funding round is disclosed; the company appears to be founder or management-controlled. Revenue, headcount, and ownership structure are not publicly available.

Name

Heater Specialist

Legal name

HSI LLC

Website

https://hsi-llc.com

Company type

Private

Founded year

1988

Operating status

Operating

Headcount range

11–50 employees

Short description

HSI LLC is a Tulsa-based, privately-held industrial fabricator founded in 1988 that designs, engineers, and manufactures custom pressure vessels, process equipment, refractory systems, and coatings for oil refining, chemical, power, petrochemical, and renewable/syngas customers, operating from a 342,000 sq. ft. facility with global multi-modal delivery.

Ownership category

akta.pro rank

Product category

Industrial Fabrication Services

NAICS

Heating Equipment (except Warm Air Furnaces) Manufacturing (333414), Mining and Oil and Gas Field Machinery Manufacturing (33313), Metal Tank (Heavy Gauge) Manufacturing (332420)

SIC

Industrial Process Furnaces & Ovens (3567), Heating Equipment, Except Electric & Warm Air Furnaces (3433), Special Industry Machinery (No Metalworking Machinery) (3550)

akta.pro primary industry

Boilers, Furnaces & Process Heating Equipment (IMAHAKAD)

akta.pro secondary industry

Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC)

Keywords

• Custom pressure vessels
• Industrial fabrication services
• Refractory installation services
• Process equipment manufacturing
• Industrial coating services

Headquarters

HQ city

Tulsa

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Infrastructure, Supply Chain, Technology or R&D, Marketing or Sales

Revenue model

1. Custom Fabrication Services: Project-based fabrication of pressure vessels, columns, towers, reactors, fired heaters, and other process equipment for industrial customers. Services include engineering consultation, fabrication, refractory lining, industrial coating, and transportation.
2. Refractory Services: Planning, production, and installation of heater refractory linings for industrial heater systems.
3. Industrial Coating Services: External and internal coating services to ensure long-term performance of industrial equipment.
4. Transportation Services: Logistics and transportation of fabricated equipment via truck, barge, and rail to project sites worldwide.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

HSI is a fully integrated single-source manufacturer that engineers, fabricates, refractory-lines, coats, quality-checks, and transports custom pressure vessels, columns, towers, reactors, regenerators, fired heaters, FCC internals, transfer lines, orifice chambers, and storage tanks for oil refining, chemical processing, power generation, and incineration customers. All design, engineering, and detailing work is performed in-house, with robotic welding/cutting integrated into the manufacturing workflow, and projects are delivered globally via truck, barge, and rail from a 342,000 sq. ft. indoor facility on 100 acres of outdoor assembly space in Tulsa, OK.

Product overview

HSI is a fully integrated single-source manufacturer providing comprehensive fabrication, refractory, coating, and engineering services. The company operates as a platform of interconnected service offerings: Fabrication Services serves as the core product delivering pressure vessels, columns, towers, storage tanks, reactors, regenerators, fired heaters, FCC internals, transfer lines, and orifice chambers; Refractory Services handles heater refractory planning, production, and installation; Industrial Coating provides external and internal coating solutions; Engineering Services offers in-house design and engineering consultation; and Transportation Services enables delivery of any project size worldwide via truck, barge, and rail. The company has 342,000 sq. ft. of indoor space and 100 acres of outdoor assembly space near the Port of Catoosa in Tulsa, OK, and has recently expanded through the acquisition of ParFab Industries Inola Facilities (2001).

Differentiator

Problem solved

Functional benefit

Products and services

• Fabrication Services Single-source, fully integrated fabrication services delivering pressure vessels, refractory-lined vessels, and process equipment with timely delivery and peak product quality for oil refining, chemical process, power generation, and incineration customers.
• Refractory Services
• Industrial Coating
• Engineering Services
• Transportation Services
• Quality Control Services
• Pressure Vessels
• Columns
• Towers
• Weld Overlay
• Storage Tanks
• Reactors
• Regenerators
• FCC Internals
• Fired Heaters
• Transfer Lines
• Orifice Chambers

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• ParFab IndustriescoreStrategic or Co-development Partner · 1 January 2024HSI acquired ParFab Industries Inola Facilities in 2024. ParFab has been a leader in end-to-end fabrication, refractory installation, and coatings solutions since 2001, serving petrochemical, refining, renewable, syngas, and energy industries. This acquisition represents a significant expansion of HSI's capabilities and commitment to delivering comprehensive solutions to clients.

Scale indicators4 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Fluor Corporation: Fluor Corporation (FLR) is a global EPC contractor with substantial petrochemical, refining, and power generation project work. While it is much broader and larger than HSI, its process equipment fabrication and self-perform scopes overlap with HSI's offerings, particularly on integrated refining and petrochemical projects.
• Babcock & Wilcox Enterprises: Babcock & Wilcox (BW) is a long-established manufacturer of industrial boilers, fired heaters, and process equipment for power generation and refining customers. It operates at broader scale than HSI across multiple geographies but serves the same core end markets and overlaps on heat-transfer equipment, boilers, and process heating.
• Bechtel Corporation: Bechtel is one of the largest privately-held EPC firms in the world with extensive refining, petrochemical, and power generation project experience. It frequently self-performs or subcontracts fabrication scopes similar to HSI's specialty, making it a broad incumbent comparable for project competition.
• KBR Inc: KBR Inc (KBR) is a global engineering and construction firm with major presence in petrochemical, refining, and energy projects. It serves the same customer base as HSI and overlaps on process equipment and EPC delivery, although at much greater scale and broader scope than HSI's specialized fabrication focus.

Direct peers

• L.B. Foster Company: L.B. Foster Company (FSTR) provides fabricated industrial products and services for rail, energy, and heavy industrial customers, including fabricated steel products and coatings. Its energy and industrial fabrication segments share customer overlap with HSI and a similar project-based business model.
• Matrix Service Company: Matrix Service Company (MTRX) provides industrial construction and fabricated storage tanks, vessels, and process equipment to oil & gas, chemical, and power customers in North America. It is one of the closest publicly-traded comparables to HSI in terms of customer base, product scope (tanks, vessels, columns), and project-based execution model.
• Chart Industries: Chart Industries (GTLS) designs and manufactures engineered process equipment serving cryogenic, petrochemical, refining, and industrial gas customers, including specialty heat exchangers and pressure vessels. Its process-equipment fabrication business overlaps directly with HSI's pressure vessel, fired heater, and process equipment scope for the same heavy-industrial end markets.
• Cianbro: Cianbro is a privately-held heavy industrial contractor and fabricator serving power, petrochemical, refining, and infrastructure customers across the US. Its fabrication capabilities for industrial process equipment and vessels overlap with HSI's core offering, and its vertically integrated construction services are analogous to HSI's single-source model.
• Welded Construction: Welded Construction is a privately-held industrial fabricator of process piping, pressure vessels, and structural modules for refining, chemical, and power customers. It is highly comparable to HSI in project scope, customer verticals, and use of skilled welders on heavy industrial projects.

Emerging players

• Optimus Steel: Optimus Steel is a specialty steel manufacturer producing structural and plate steel products used in heavy industrial fabrication. While narrower in finished-product scope than HSI, it is a relevant supplier/adjacent peer given HSI's heavy consumption of plate steel for pressure vessels, towers, and process equipment.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Heater Specialist