We continually work with international bodies and companies to maintain a spectrum of accreditations and approvals for our company and our range of products

Det Norsk Veritas (DNV GL) approved to ISO 9001: 2015

T2 Alloys Limited is approved to ISO9001:2015. Please click on the DNV  logo for a copy of our certificate. From the manufacture of the raw material through to the despatching of your order, DNV has approved and audited every step. Please let us know if you require additional testing or third party auditing of your order.

Tungum tubing has the approval of:

  • ASME – American Society of Mechanical Engineers Section 1, VIII, B31.1 & B31.3 Code Cases - download PDF.
  • USCG – United States Coast Guard - download PDF.
  • NORSOK  – M-650 Qualification of manufacturers of special materials - download PDF.
  • ABS – American Bureau of Shipping Type Approval - download PDF.
  • RINA - Registro Italiano Navale - RINA Services S.p.A. - download PDF.
  • BAM – Federal Institute for Gaseous Oxygen Service, tested in accordance with ASTM G124-10 (2010) - download PDF.
  • FPAL – Achilles First Point Assessment for suppliers to the Oil & Gas Industry (Supplier No. 10054096) - download PDF.
  • IMCA – International Marine Contractors Association – Document D012 – approved for use in oxygen systems - download PDF.
  • DNV - Mill manufacturer approval - download PDF.
  • Lloyds Register of Shipping - download PDF.

BP Approval GP36-15-1

BP has approved Tungum tubing for “non-process” applications GP36-15-1. Tungum has passed extensive testing and is segment defined for mitigating and preventing external corrosion on topside small bore tubing.

Shell Approval

Tungum features in the Shell Global Design and Engineering Standard, table 4 (instrumentation materials)  Selection of materials for life cycle performance (upstream facilities) – equipment DEP Feb 2013.


Tungum tubing is manufactured to meet a variety of specifications according to the demands of the end user including:

National and international specifications:

BS EN 12449 CW700R R430
ASTM B706-TF00 (identified as Seamless Copper Alloy UNS No. C69100)

Defence specifications:

Army AFS 4000
DEF STAN 02-878 - previously 02-749 (NES 749) Part 3
Aircraft DTD 253A & DTD 5019

Tungum in-house specification:

TCL100 Iss. 13

Note: Some of the specifications only apply to certain tube sizes or mill orders. Please check with us before ordering.