Company lists · Data refreshed September 2026

Top 25 Hydrocarbon processing plant builders worldwide

Name: Hydrocarbon processing plant builders worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 5,178 companies tracked

RevenueBase identified 5,178 hydrocarbon processing plant builders worldwide as of September 2026 and tracks 423,906 professional contacts across them, including 66,637 with verified work emails. The United States is the largest market and Tehran the largest hub.

This list covers hydrocarbon processing plant builders worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026. Country and city lists for hydrocarbon processing plant builders follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

5,178Companies

423,906Contacts tracked

66,637Verified emails

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The 25 largest hydrocarbon processing plant builders worldwide

Ranked by team size

Top 25 of 5,178 hydrocarbon processing plant builders worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to hydrocarbon processing plant builders: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Saipem	Indirect evidence	Milan, ItalyHQ checked Sep 20, 2026	10001+	34,095 contacts →
	Indirect evidence “Saipem is a global leader in the engineering and construction of major projects for the energy and infrastructure sectors, both offshore and onshore.” Source: RevenueBase Database · checked Sep 20, 2026
2	Mcdermott International, LTD	Indirect evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	10001+	20,135 contacts →
	Indirect evidence “McDermott is a premier provider of engineering and construction solutions to the energy industry.” Source: RevenueBase Database · checked Sep 20, 2026
3	Petrofac	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	5,001-10,000	13,261 contacts →
	Indirect evidence “We are a leading international service provider to the energy industry, with a diverse client portfolio including many of the world’s leading energy companies.” Source: RevenueBase Database · checked Sep 20, 2026
4	Tecnicas Reunidas	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	10001+	10,588 contacts →
	Indirect evidence “TR is an international general contractor engaged in the engineering and construction of industrial facilities in the fields of-Oil & Gas -Refining & Petrochemical -Power…” Source: RevenueBase Database · checked Sep 20, 2026
5	KENT	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 20, 2026	10001+	7,045 contacts →
	Indirect evidence “We design, build and maintain the assets that power the world for today and make it future-ready for tomorrow.” Source: RevenueBase Database · checked Sep 20, 2026
6	Samsung E&a	Indirect evidence	Gangdong-gu, South KoreaHQ checked Sep 20, 2026	5,001-10,000	7,011 contacts →
	Indirect evidence “SAMSUNG E&A is one of the world’s leading engineering, procurement, construction and project management (EPC & PM) companies.” Source: RevenueBase Database · checked Sep 20, 2026
7	Zachry Group	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 20, 2026	10001+	6,824 contacts →
	Indirect evidence “Zachry Group is North America's pacesetter in turnkey engineering, construction, maintenance, turnaround and fabrication services to the energy, chemicals, power, manufacturing…” Source: RevenueBase Database · checked Sep 20, 2026
8	Nmdc Energy	Indirect evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 20, 2026	10001+	6,786 contacts →
	Indirect evidence “Established in 1973, NMDC Energy (formerly NPCC) is a leading EPC company working in the energy sector.” Source: RevenueBase Database · checked Sep 20, 2026
9	GS E&c	Partial evidence	Seoul, South KoreaHQ checked Sep 20, 2026	5,001-10,000	6,051 contacts →
	Partial evidence “GS E&C is Korea`s representative global contractor leveraging its experience in Civil Engineering, Building, Oil & Gas, Power Plants and Renewable Energy to continually provide…” Source: RevenueBase Database · checked Sep 20, 2026
10	Aesa A-Evangelista SA	Indirect evidence	Canning, IndiaHQ checked Sep 20, 2026	5,001-10,000	5,012 contacts →
	Indirect evidence “Since 1948 we specialize in projects for the energy industry.” Source: RevenueBase Database · checked Sep 20, 2026
11	Bonatti	Indirect evidence	Parma, United StatesHQ checked Sep 20, 2026	5,001-10,000	4,895 contacts →
	Indirect evidence “Bonatti is an International Contractor providing services to energy industry with over 75 years of experience.” Source: RevenueBase Database · checked Sep 20, 2026
12	S&b	Indirect evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	5,001-10,000	3,510 contacts →
	Indirect evidence “S&B is an engineer and constructor that designs and builds some of the largest and most complex industrial facilities in the world.” Source: RevenueBase Database · checked Sep 20, 2026
13	ENPPI	Indirect evidence	Nasr City 1, United StatesHQ checked Sep 20, 2026	1,001-5,000	3,370 contacts →
	Indirect evidence “Enppi is globally recognized as a major engineering, EPC main contractor, and management contractor, with decades of experience in onshore and offshore projects in the oil and…” Source: RevenueBase Database · checked Sep 20, 2026
14	Nbtc Group	Indirect evidence	Shuaiba Industrial, KuwaitHQ checked Sep 20, 2026	10001+	3,164 contacts →
	Indirect evidence “Being established in 1977, NBTC had flourished its self as a leading EPC contracting company through a combination of highly empowered attributes via entrepreneurial leadership…” Source: RevenueBase Database · checked Sep 20, 2026
15	Toyo Engineering Corporation	Partial evidence	Chiba-shi Mihama-ku, JapanHQ checked Sep 20, 2026	1,001-5,000	2,760 contacts →
	Partial evidence “Toyo Engineering is an engineering company that constructs the plant in a global stage centering on the plant engineering field.” Source: RevenueBase Database · checked Sep 20, 2026
16	Estrutural	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 20, 2026	1,001-5,000	2,461 contacts →
	Indirect evidence “Quem somos: Somos uma empresa nacional, com mais de 30 anos no segmento da construção, montagem e manutenção industrial.” Source: RevenueBase Database · checked Sep 20, 2026
17	Qatar Engineering & Construction Company W.L.L	Indirect evidence	Ras Laffan Industrial City (rlic), QatarHQ checked Sep 20, 2026	5,001-10,000	2,222 contacts →
	Indirect evidence “Qatar Engineering & Construction Company (Qcon) is the leading National EPC & Maintenance Contractor in the Oil & Gas, Petrochemical, Fertilizer and Power industries.” Source: RevenueBase Database · checked Sep 20, 2026
18	Montcalm Montagens Industriais	Indirect evidence	São Paulo, BrazilHQ checked Sep 20, 2026	1,001-5,000	2,088 contacts →
	Indirect evidence “Fundada em 1971, a Montcalm tem como missão, oferecer soluções de engenharia construtiva para implantação, ampliação e manutenção de indústrias de processos, sempre com o…” Source: RevenueBase Database · checked Sep 20, 2026
19	CTCI	Indirect evidence	Taipei City, TaiwanHQ checked Sep 20, 2026	5,001-10,000	2,056 contacts →
	Indirect evidence “CTCI (TWSE: 9933, TPEx: 5209, TPEx: 6803) is a global engineering, procurement, and construction (EPC) services provider.” Source: RevenueBase Database · checked Sep 20, 2026
20	Brown & Root Industrial Services, LLC	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 20, 2026	5,001-10,000	1,940 contacts →
	Indirect evidence “Brown & Root Industrial Services offers the full range of industrial services – engineering, construction, maintenance, turnaround, and specialty (painting, scaffolding…” Source: RevenueBase Database · checked Sep 20, 2026
21	ELFE	Indirect evidence	Macaé, BrazilHQ checked Sep 20, 2026	1,001-5,000	1,898 contacts →
	Indirect evidence “No mercado há mais de duas décadas, a Axia é uma empresa nacional com atuação em operação e manutenção industrial.” Source: RevenueBase Database · checked Sep 20, 2026
22	Dietsmann	Partial evidence	Fontvieille, MonacoHQ checked Sep 20, 2026	5,001-10,000	1,843 contacts →
	Partial evidence “Dietsmann is the leading independent specialist in Operation & Maintenance services for continuous-production plant in the oil & gas and power industries with over 40 years of…” Source: RevenueBase Database · checked Sep 20, 2026
23	Rotary Engineering	Indirect evidence	SingaporeHQ checked Sep 20, 2026	5,001-10,000	1,841 contacts →
	Indirect evidence “Founded 1972 in Singapore, Rotary Engineering is your Strategic Energy Partner providing Integrated Infrastructure Solutions with a sustainability focus.” Source: RevenueBase Database · checked Sep 20, 2026
24	Groupe Ponticelli Frères	Indirect evidence	FranceHQ checked Sep 20, 2026	5,001-10,000	1,829 contacts →
	Indirect evidence “The Ponticelli Frères Group is one of the main European service suppliers to companies in the energy (oil and gas, nuclear, renewable energy), industrial (chemical, steelworks…” Source: RevenueBase Database · checked Sep 20, 2026
25	AYTB	Indirect evidence	Jubail Industrial City, Saudi ArabiaHQ checked Sep 20, 2026	5,001-10,000	1,812 contacts →
	Indirect evidence “AYTB had recognized the Saudi Dream 45 years ago when the Royal Commission for Jubail and Yanbu was set up with a vision to build a huge petrochemical industry to catapult Saudi…” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: hydrocarbon processing plant builders. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names hydrocarbon processing plant builders.
Partial evidence: Its own public description names part of hydrocarbon processing plant builders, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydrocarbon processing plant builders. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 5,178 hydrocarbon processing plant builders worldwide

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Hydrocarbon processing plant builders worldwide at a glance

As of Sep 20, 2026

15.7%Verified-email coverage

81.9Average contacts per company

51-200Median size (employees)

4.2%Largest-city concentration · Tehran

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

911

11-50

1,625

51-200

1,312

201-500

623

501-1,000

287

1,001-5,000

291

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among hydrocarbon processing plant builders, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for hydrocarbon processing plant builders are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “hydrocarbon processing plant builders”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names hydrocarbon processing plant builders), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among hydrocarbon processing plant builders, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 66,637 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Hydrocarbon processing plant builders by location

25 lists · largest first

Every Hydrocarbon processing plant builders list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names hydrocarbon processing plant builders, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many hydrocarbon processing plant builders are there worldwide?

RevenueBase identified 5,178 hydrocarbon processing plant builders worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Saipem, headquartered in Milan, tops this list with the largest team on record.

Which country has the most hydrocarbon processing plant builders?

The United States leads with 778 companies, followed by India (327) and Iran (291). Every hydrocarbon processing plant builders list by country and city is linked on this page.

Which city has the most hydrocarbon processing plant builders?

Tehran leads with 215 headquartered companies, followed by Houston (126) and Port Harcourt (76).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 66,637 verified decision-maker contacts tracked across these 5,178 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.