Company lists · Data refreshed September 2026

Top 25 Oil refinery equipment contractors based in Spain

Name: Oil refinery equipment contractors based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 280 companies tracked

RevenueBase identified 280 oil refinery equipment contractors headquartered in Spain as of September 2026 and tracks 18,854 professional contacts across them, including 3,048 with verified work emails. Madrid is the largest hub.

This list covers oil refinery equipment contractors headquartered in Spain, 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 17, 2026.

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 17, 2026 86% judged on-target in blind review

280Companies

18,854Contacts tracked

3,048Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest oil refinery equipment contractors based in Spain

Ranked by team size

Top 25 of 280 oil refinery equipment contractors based in Spain, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to oil refinery equipment contractors: 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	Tecnicas Reunidas	Strong evidence	Madrid, SpainHQ checked Sep 17, 2026	10001+	10,588 contacts →
	Strong 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 17, 2026
2	Dragados Offshore	Indirect evidence	11510 Puerto Real, SpainHQ checked Sep 17, 2026	1,001-5,000	1,348 contacts →
	Indirect evidence “Founded in 1972, Dragados Offshore S.A.” Source: RevenueBase Database · checked Sep 17, 2026
3	Nervion Industries, Engineering & Services, S.L	Indirect evidence	Bilbao, SpainHQ checked Sep 17, 2026	1,001-5,000	681 contacts →
	Indirect evidence “NERVION INDUSTRIES is a business group dedicated to industrial services and applied engineering, providing services in strategic sectors.” Source: RevenueBase Database · checked Sep 17, 2026
4	Tubacex	Indirect evidence	Llodio, SpainHQ checked Sep 17, 2026	1,001-5,000	499 contacts →
	Indirect evidence “Tubacex is a global front-runner in the design, manufacturing and installation of high-value-added industrial products and services for the energy and mobility sectors.” Source: RevenueBase Database · checked Sep 17, 2026
5	Grupo Masa	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	1,001-5,000	450 contacts →
	Indirect evidence “MASA interviene en toda la cadena de actividades en la vida de las instalaciones e infraestructuras, desde su fase de proyecto, hasta la construcción y montaje de la instalación…” Source: RevenueBase Database · checked Sep 17, 2026
6	MEISA	Indirect evidence	Argamasilla De Calatrava, SpainHQ checked Sep 17, 2026	1,001-5,000	428 contacts →
	Indirect evidence “MEISA (Proyectos y Mantenimientos Mecánicos, Eléctricos y de Instrumentación), se constituyó en 1998, viendo las oportunidades de mercado de negocio y demanda creciente de los…” Source: RevenueBase Database · checked Sep 17, 2026
7	Moncobra	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	501-1,000	292 contacts →
	Indirect evidence “Empresa de referencia del Grupo Cobra especializada en diseño, ingeniería, instalaciones y montajes mecánicos y eléctricos y mantenimiento industrial.” Source: RevenueBase Database · checked Sep 17, 2026
8	Kaefer Servicios Industriales	Indirect evidence	Erandio, SpainHQ checked Sep 17, 2026	1,001-5,000	261 contacts →
	Indirect evidence “At KAEFER, we are your strategic partner for integrated industrial maintenance solutions.” Source: RevenueBase Database · checked Sep 17, 2026
9	Siemsa	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	501-1,000	246 contacts →
	Partial evidence “Siemsa es un operador independiente que proporciona servicios para el sector de la Energía, Industria y Oil and Gas, sistemas de control y analizadores de proceso, así como…” Source: RevenueBase Database · checked Sep 17, 2026
10	Teiga TMI	Indirect evidence	Bergondo, SpainHQ checked Sep 17, 2026	201-500	204 contacts →
	Indirect evidence “TEIGA TMI es una empresa con más de 40 años de experiencia, que ofrece soluciones y servicios de ingeniería; montaje y mantenimiento mecánico-eléctrico; con implantación en…” Source: RevenueBase Database · checked Sep 17, 2026
11	Lointek	Partial evidence	Urduliz, SpainHQ checked Sep 17, 2026	201-500	140 contacts →
	Partial evidence “LOINTEK is a private company firmly established in the international market of engineering, supply, manufacture and service in the sector of equipment for the industry of the…” Source: RevenueBase Database · checked Sep 17, 2026
12	Grupo Ditecsa	Indirect evidence	Sevilla, SpainHQ checked Sep 17, 2026	1,001-5,000	127 contacts →
	Indirect evidence “Ditecsa, fundada en 1993, es una compañía internacional especializada en la gestión integral de plantas industriales.” Source: RevenueBase Database · checked Sep 17, 2026
13	Novargi	Partial evidence	Vitoria-gasteiz, SpainHQ checked Sep 17, 2026	51-200	123 contacts →
	Partial evidence “NOVARGI GROUP, is a global integral engineering solutions contractor for the Energy and Fertilizer Industry.” Source: RevenueBase Database · checked Sep 17, 2026
14	IDESA	Partial evidence	Gijón, SpainHQ checked Sep 17, 2026	201-500	114 contacts →
	Partial evidence “Founded in 1993, IDESA has grown to become one of the most currently recognized and respected companies in the design, fabrication and supply of static and modular equipment…” Source: RevenueBase Database · checked Sep 17, 2026
15	Eia21	Indirect evidence	Erandio, SpainHQ checked Sep 17, 2026	51-200	113 contacts →
	Indirect evidence “Founded in 1979, EIA21 was chartered with the aim of responding to the engineering needs of high growth industrial companies, soon achieved a strong footprint in this area…” Source: RevenueBase Database · checked Sep 17, 2026
16	Iturcemi Grupo	Indirect evidence	Avilés, SpainHQ checked Sep 17, 2026	51-200	100 contacts →
	Indirect evidence “Iturcemi ingeniería con más de 25 años de experiencia, siendo un referente en el sector en el Norte de España.” Source: RevenueBase Database · checked Sep 17, 2026
17	Montrel	Indirect evidence	Sevilla, SpainHQ checked Sep 17, 2026	51-200	97 contacts →
	Indirect evidence “With over 60 years of experience, Montrel is a leading company in innovative comprehensive solutions in the energy and industrial sectors.” Source: RevenueBase Database · checked Sep 17, 2026
18	Fullgas	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	51-200	94 contacts →
	Indirect evidence “Desarrollo y diseño de productosy servicios para los sectores petrolífico y medioambiental Áreas de actividad- TELEMETRÍA: Sistemas de control de tanques-lectura de contadores -…” Source: RevenueBase Database · checked Sep 17, 2026
19	Dynatec, S.A	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	201-500	88 contacts →
	Indirect evidence “Engineering company based in Madrid, Spain with over 40 years of experience in the fields of petrochemical and industrial engineering, conventional and nuclear power plants…” Source: RevenueBase Database · checked Sep 17, 2026
20	Comaple	Indirect evidence	Villafranca Del Castillo, SpainHQ checked Sep 17, 2026	51-200	64 contacts →
	Indirect evidence “Empresa líder en el sector de suministro de material eléctrico, instrumentación y comunicaciones para proyectos industriales e infraestructuras.” Source: RevenueBase Database · checked Sep 17, 2026
21	Ledr Ingenieria Y Servicios SL	Indirect evidence	Abrera, SpainHQ checked Sep 17, 2026	51-200	63 contacts →
	Indirect evidence “En LEDR Ingeniería y Servicios SL no solo diseñamos sobre el plano, nuestra verdadera fuerza reside en la capacidad de ejecutar proyectos desde el concepto inicial hasta la puesta…” Source: RevenueBase Database · checked Sep 17, 2026
22	Dipicell	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	201-500	62 contacts →
	Indirect evidence “Dipicell es una empresa de servicios industriales especializada en electricidad, instrumentación, sistemas de control y medio ambiente.” Source: RevenueBase Database · checked Sep 17, 2026
23	Ineltron Solutions	Indirect evidence	Betanzos, SpainHQ checked Sep 17, 2026	201-500	58 contacts →
	Indirect evidence “INELTRON es una empresa multinacional especializada en la prestación de servicios de ingeniería, construcción, puesta en marcha, operación y mantenimiento en sistemas de…” Source: RevenueBase Database · checked Sep 17, 2026
24	Kuadrotek	Indirect evidence	Constantí, SpainHQ checked Sep 17, 2026	51-200	55 contacts →
	Indirect evidence “KUADROTEK, empresa integrada en el GRUPO ELEKTRA, especializada en el diseño, desarrollo y puesta en marcha de equipos electrónicos para la automatización de máquinas y procesos…” Source: RevenueBase Database · checked Sep 17, 2026
25	Aguilar Y Salas S.A	Indirect evidence	Barcelona, SpainHQ checked Sep 17, 2026	51-200	49 contacts →
	Indirect evidence “ENG Aguilar y Salas, s.a.” Source: RevenueBase Database · checked Sep 17, 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: oil refinery equipment contractors. 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 oil refinery equipment contractors.
Partial evidence: Its own public description names part of oil refinery equipment contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil refinery equipment contractors. 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 280 oil refinery equipment contractors based in Spain

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 3,048 reachable decision-makers.

Free signup · no credit card

View the full list →

Oil refinery equipment contractors based in Spain at a glance

As of Sep 17, 2026

16.2%Verified-email coverage

67.3Average contacts per company

11-50Median size (employees)

11.4%Largest-city concentration · Madrid

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

122

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 280 companies.

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 oil refinery equipment contractors, 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.
What qualifies: Companies headquartered in Spain whose own description of what they do matches “oil refinery equipment contractors”. 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 oil refinery equipment contractors), 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 oil refinery equipment contractors, and records with no verified work email. Companies headquartered outside Spain are excluded even when they keep an office there.
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, 3,048 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 17, 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.

Oil refinery equipment contractors by metro

Oil refinery equipment contractors in Madrid32

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 oil refinery equipment contractors, 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 oil refinery equipment contractors are there based in Spain?

RevenueBase identified 280 oil refinery equipment contractors headquartered in Spain 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?

Tecnicas Reunidas, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most oil refinery equipment contractors?

Madrid leads with 32 headquartered companies, followed by Gijon (11) and Barcelona (10).

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 3,048 verified decision-maker contacts tracked across these 280 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 17, 2026.

Ready to reach these companies? Verified emails and direct dials for all 280 oil refinery equipment contractors based in Spain. Start with a free account, no credit card.

Download this list →

Related lists

Oil refinery equipment contractors by geography

Browse the directory

Browse: Companies home · All Spain lists · All Oil refinery equipment contractors lists · New lists

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.