Certificates & approvals

Please note that certificates issued before October 2017 still carry our former company name and will maintain their validity even after the renaming of our company.

Certificates Integrated Management System

DIN EN ISO 9001

DIN EN ISO 14001

DIN ISO 45001

DIN EN ISO 50001

Further certificates & approvals

AD 2000 HP0 / W0

AEO F

API 5L / API 5CT

Bureau Veritas

DCA certificate

DEKRA

DNV GL

PED 2014/68/EU

DVGW certificate

KIWA

Declaration of performance for structural hollow section

Declaration of performance for water line pipes

Lloyds Register

TÜV Nord Certificate for HFI-welded structural hollow section TÜV Süd Certificate for HFI-welded pipe for the transport of compressed gaseous hydrogen

Certificates Integrierted Management System (IMS)

DIN EN ISO 9001

DIN EN ISO 14001

DIN ISO 45001

DIN EN ISO 50001

Further certificates & approvals

AD 2000 HP0 / W0

AEO F

Mannesmann_LP_AEOF_certificate_128584_German.pdf

API 5L / API 5CT

API 5L, English (valid until 04/2026)Siegen plant
API 5CT, English (valid until 04/2026)Siegen plant
API 5L, English (valid until 04/2026)Hamm plant
API 5CT, English (valid until 04/2026)Hamm plant

Bureau Veritas

Bureau Veritas, English (valid until 02/2027)Siegen plant
Bureau Veritas, English (valid until 02/2027)Hamm plant

DCA certificate

DEKRA certificates for load securing

DEKRA load securing certificate (German)For pipes with diameters 114 to 508 mm
DEKRA load securing certificate (German)For pipes with diameter 610 mm

DNV GL

DNV GL, English (valid until 07/2024) Siegen plant
DNV GL, English (valid until 06/2024)Hamm plant

PED 2014/68/EU

DVGW certificate

DVGW certificate, English (valid until 06/2025)Hamm plant
DVGW certificate, German (valid until 06/2025)Hamm plant
DVGW certificate, English (valid until 06/2026)Siegen plant
DVGW certificate, German (valid until 06/2026)Siegen plant

KIWA

Declaration of performance for structural hollow section

Declaration of performance for structural hollow section

Leistungserklärung für Hohlprofile für den Stahlbau

Declaration of performance for water pipe lines

Declaration of performance for water pipe lines

Leistungserklärung für Wasserleitungsrohre

Lloyds Register

Lloyds Register, English (valid until 08/2025)Hamm plant
Lloyds Register, English (valid until 06/2026)Siegen plant

TÜV NORD Certificate for HFI-welded structural hollow sections

TÜV Süd Certificate für HFI welded pipe for the transport of compressed gaseous hydrogen

TÜV Süd Certificate for HFI-welded pipe for the transport of compressed gaseous hydrogen, (valid until 01/2026)