Piping

What Piping does

Solines GmbH is a privately held German steel pipe trading and custom fabrication company headquartered in Dortmund with a second branch in Moerdijk, Netherlands. Founded in 1990, the company sources overproduced, declassified, and surplus steel pipes from established European tube manufacturers and resells them—primarily without factory certificates—at price points below certified factory equivalents. It permanently stocks approximately 40,000 tonnes of round, square, and rectangular steel pipes (plus 2,500 tonnes of separately-held galvanized pipe) across diameters from 10 mm to 2,500 mm, with wall thicknesses from 1 mm to over 30 mm and lengths from 3 m to 7.5+ meters.

The product portfolio spans longitudinal welded, spiral welded, and seamless steel pipes; galvanized and PE-coated pipes for corrosion protection; construction pipes to EN 10219; thick- and thin-walled pipes; and a full range of foundation-related products including bored piles, driven piles, micropiles, grout-injected (GSI) piles, casing pipes, and steel casings. Through its Solines Welding & Construction division, the company delivers in-house custom fabrication—welding, sawing, expanding, beveling, coating, and galvanizing—producing project-ready components such as drill tips, flanges, foot plates, and bored points, with independent quality inspection handled via partnership with Elements (Breda).

The business operates a direct, sales-led go-to-market model: customers request quotes by phone or via a Typeform web form, and pricing is quote-based with volume discounts for large orders. Distribution is handled through owned logistics (4 terminal trucks, 5 normal plus 2 tele-semi-trailers, own rail siding at Dortmund, deep-sea port access at Moerdijk) supplemented by a third-party carrier network for direct-to-site delivery across Europe. Customers are primarily enterprise and government buyers across foundation engineering, port and maritime infrastructure, civil works, construction, and greenhouse/agricultural applications in Germany, the Netherlands, and broader Europe (with documented project deliveries into Ireland, Switzerland, and Austria). The company is led by Managing Director Leonora Engelaer and operates as an independent private GmbH with no disclosed external investors or parent entity.

Name

Piping

Legal name

Solines GmbH

Website

https://solines.de

Company type

Private

Founded year

1990

Operating status

Operating

Headcount range

11–50 employees

Short description

Solines GmbH is a Dortmund-based steel pipe trader and custom fabricator stocking ~40,000 tonnes across DE/NL facilities, serving foundation, port, civil, and construction customers across Europe with both surplus pipe resale and in-house welding/fabrication services.

Ownership category

akta.pro rank

Product category

Steel Pipe Trading & Distribution

NAICS

Metal Service Centers and Other Metal Merchant Wholesalers (423510), Iron and Steel Pipe and Tube Manufacturing from Purchased Steel (331210), Fabricated Pipe and Pipe Fitting Manufacturing (332996)

SIC

Steel Pipe & Tubes (3317), Wholesale-Metals & Minerals (No Petroleum) (5050), Miscellaneous Fabricated Metal Products (3490)

akta.pro industry

PRIMARYIMAKABAL

Steel Service Centers & Processing (Slitting, Cut-to-Length, Blanking, Leveling)

Industrials, Manufacturing & Construction/Metals & Mining/Steel Production & Processing

SECONDARYIMAKABAI

Pipe & Tube Manufacturing (Seamless & Welded OCTG/Line Pipe/Structural Tube)

Industrials, Manufacturing & Construction/Metals & Mining/Steel Production & Processing

Keywords

• Steel pipe trading
• Steel pipe distribution
• Foundation piles
• Custom steel fabrication
• Construction steel supply

Headquarters

HQ city

Dortmund

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Inventory, Operations, Personnel, Infrastructure, Marketing or Sales

Revenue model

1. Steel Pipe Sales (Surplus/Overrun): Solines purchases overproduced and declassified steel pipes from renowned European tube manufacturers and resells them. Pipes are new (unused) but sold without factory certificates, offering quality at competitive prices. The company also sells surplus quantities and profile tubes.
2. Custom Fabrication Services (Solines Welding & Construction): On-site custom steel processing including cutting to length, welding of components (drill tips, foot plates, flanges, bored points), expanding, beveling, and applying coatings or galvanization. These services are bundled with pipe sales as a value-add.
3. Galvanized and Coated Pipe Sales: Sale of hot-dip galvanized steel pipes (PE-coated pipes) for corrosion protection, catering to construction, gas piping, and agricultural (stables, horticulture) applications.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

Solines GmbH trades and distributes new steel pipes and profiles sourced as overproduction and declassified batches from European tube manufacturers, holding a permanent stock of approximately 40,000 tonnes in diameters from 10 mm to 2,500 mm across facilities in Dortmund (Germany) and Moerdijk (Netherlands). Through its Solines Welding & Construction division, the company also provides custom in-house fabrication including cutting, welding, expanding, beveling, and applying PE or galvanized coatings, delivering project-ready steel pipe components to construction, foundation engineering, port, and infrastructure customers across Europe.

Product overview

Solines GmbH is a steel pipe trading company operating as both a distributor and specialist merchant, offering a comprehensive portfolio of steel pipe products with approximately 40,000 tonnes permanently stocked across facilities in Dortmund, Germany and Moerdijk, Netherlands. The product range includes longitudinal welded steel pipes, spiral welded steel pipes, seamless steel pipes, galvanized steel pipes, coated steel pipes, and various pile types (bored, driven, foundation, and grout-injected piles). The company provides custom processing services through its Solines Welding & Construction division, offering welding, cutting, expanding, and coating capabilities. Pipes are available in diameters ranging from 10 mm to 2,500 mm, serving construction, foundation engineering, water management, infrastructure, and industrial applications throughout Europe.

Differentiator

Problem solved

Functional benefit

Products and services

• Longitudinal Welded Steel Pipes (Längsnahtgeschweißte Stahlrohre) Longitudinal welded steel pipes in diameters from 14.0 mm to 762.0 mm with various wall thicknesses, available up to 8 meters in length and with optional PE coating. Stock item for general construction and industrial buyers.
• Spiral Welded Steel Pipes (Spiralnahtgeschweißte Stahlrohre) Spiral welded steel pipes for construction and foundation applications, available in large diameters up to 2,500 mm. Stock item used in heavy infrastructure and deep foundation projects.
• Seamless Steel Pipes (Nahtlose Stahlrohre) Seamless steel pipes held in stock for various industrial applications, including higher-pressure and mechanical uses where weld-free construction is required.
• Hot-Dip Galvanized Steel Pipes (Verzinkte Stahlrohre) Hot-dip galvanized steel pipes with smooth ends compliant with DIN 2440 and NEN standards for gas and construction applications, with a permanent stock of 2,500 tonnes. Sold in 6-meter commercial lengths.
• Coated Steel Pipes (Beschichtete Stahlrohre) PE-coated and DTM-coated steel pipes for enhanced corrosion protection, available with various coating options. Targeted at construction, gas piping, and agricultural applications such as stables and horticulture.
• Bored Piles (Bohrpfähle) Steel pipe piles for bored-pile foundation construction, fully equipped with in-house welding, expanding, and coating capabilities up to 508 mm diameter. Used by foundation contractors for building and infrastructure projects.
• Micropiles / Grout-Injected Piles (Mikropfähle / GSI-Pfähle) Small-diameter steel pipe piles used in confined spaces and for foundation repairs, including grout-injected variants combining high load-bearing capacity with stability for modern deep foundation work.
• Driven Piles (Rammpfähle) Steel pipe piles installed using vibration-free driving techniques, available in various diameters with expansion joints for building, bridge, and infrastructure foundations.
• Foundation Piles (Gründungspfähle) Steel pipe foundation piles for buildings, schools, halls, and machine foundations, made from S235 or S355 steel grades and supplied to specification.
• Casing Pipes (Mantelrohre) Casing pipes for cable or pipe transportation, available in any desired length with optional PE coating. Used as sleeves for district heating, water, and cable infrastructure projects.
• Construction Pipes (Konstruktionsrohre) Structural steel pipes per EN 10219 standard, available in diameters 21.3 to 114.3 mm with wall thicknesses 2.0 to 4.5 mm, for greenhouse, railing, and construction applications.
• Square and Rectangular Steel Pipes (Vierkant Stahlrohr) Square and rectangular profile pipes for structural applications, including fencing, scaffolding, and steel structures.
• Thick-Walled Steel Pipes (Dickwandige Stahlrohre) Heavy-walled steel pipes for demanding structural and industrial applications such as high-pressure pipelines and heavy-load foundation piles.
• Thin-Walled Steel Pipes (Dünnwandige Stahlrohre) Light-gauge steel pipes for applications requiring lower wall thickness specifications, such as light structural and fabrication uses.
• Gas Pipes (Gasrohre) Fire-galvanized steel pipes with smooth ends in 6-meter commercial lengths, compliant with DIN 2440 and NEN standards, sold for gas distribution applications.
• Surplus Steel Pipes (Stahlrohre aus überschüssigen Chargen) New steel pipes from excess or downgraded batches of reputable European manufacturers, sold without factory certification at competitive prices as a distinct surplus/overrun product line.
• Steel Casings / Sheathes (Stahlköcher) Steel sheathes in various sizes for constructions requiring flat sides, used as support structures for machines and buildings.
• Custom Steel Fabrication — Solines Welding & Construction (Maßarbeit / Anarbeitung) In-house custom steel processing services including cutting to length, welding of components (drill tips, foot plates, flanges, bored points), expanding, beveling, applying PE coatings, and hot-dip galvanizing. Delivered as project-ready pipe components bundled with pipe sales.

Quantifiable outcome

• Deliver quotes within 12 hours or one working day
• +2 more outcomes

Named customers10 records

Segments6 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• VDB Funderingstechnieken B.V.project-specificStrategic or Co-development Partner · 6 May 2026VDB Funderingstechnieken from the Netherlands executed foundation work for a villa project in Warmond. Solines produced and delivered 89 GSI compression piles (Ø 168 mm and Ø 219 mm, 17m each). This is a project-level collaboration where Solines supplies steel pipe piles and VDB installs them — a complementary working relationship in the deep foundation value chain.

Scale indicators6 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Salzgitter AG: One of Europe's largest steel producers with a broad portfolio including line pipes, HFI-welded tubes, and steel service activities via subsidiaries like Salzgitter Mannesmann. Competes in Solines' core product categories at scale across Europe.
• Tenaris: Global leader in seamless and welded steel pipe manufacturing for energy, industrial, and infrastructure applications. Competes with Solines on large-diameter line pipe and foundation pile segments across Europe.
• Klöckner & Co: One of Europe's largest metal service center and distribution groups, distributing steel tubes, plates, and structural products. Overlaps with Solines on steel pipe and tube distribution across DACH and Benelux.
• Vallourec: Premium steel pipe producer supplying seamless and welded tubes for energy, construction, and mechanical applications. A relevant incumbent in the European line pipe and foundation pile market.
• Benteler Steel/Tube: European manufacturer of seamless and welded steel tubes serving automotive, construction, and industrial segments. Comparable in welded tube production and large-diameter offering.
• Voestalpine Steel Division: Major European steel producer with a wide range of welded and seamless tubes and a steel service center network. Overlaps with Solines on welded tubes and processed steel distribution for construction and infrastructure.

Direct peers

• Stalatube: Northern European manufacturer of stainless and structural steel tubes and hollow sections. Comparable in serving construction, infrastructure, and processing-customers with cut-to-length and welded services.
• Europipe GmbH: Manufacturer of large-diameter longitudinal and spiral welded steel line pipes for gas, oil, water, and structural piling. Direct competitor in the large-diameter pipe category Solines stocks for infrastructure and foundation projects.
• Mannesmann Line Pipe: European manufacturer and supplier of longitudinal and spiral welded large-diameter steel line pipes used in infrastructure, port, and foundation projects. Directly comparable in product format (welded steel pipes, large diameters) and overlapping customer base in energy and civil infrastructure.
• Buhlmann Group: German-based steel tube distributor and service center offering welded, seamless, and stainless tubes with in-house processing (cutting, welding, surface treatment). Direct parallel to Solines' trading-plus-fabrication model in DACH and Northern Europe.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/VSolines
• YouTubeyoutube.com/c/SolinesDeutschland
• Facebookfacebook.com/SolinesGmbH
• LinkedInlinkedin.com/company/solines-gmbh
• Instagraminstagram.com/solines.steeltubes
• Pinterestnl.pinterest.com/Solinessteeltubes

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 Piping