Fearnley Procter NS-1™ Certification Duraband ® NC Certifications Duraband ® NC is Fearnley Procter NS-1™ certified for new application to tool joints. It is also certified for re-application to tool joints over itself and the following hardbanding products as specified in the NS-1™ approval certificates. This eliminates the expensive procedure of removing the previous layer of hardbanding.

Duraband ® is certified for application over the following products.
Duraband NC Certifications Tuffband NC is Fearnley Procter NS-1™ certified for new application to tool joints. It is also certified for re-application to tool joints over itself and the following hardbanding product(s) as specified in the NS-1™ approval certificates .


What are these Certifications? In 2000, Fearnley Procter Group 1 purchased Shell SQAIR rights from Shell UK 2 and published certifications under the NS- 1™ designation. To be qualified for NS-1™ Certification, Initial Application, the Duraband procedure had to be approved by a committee of experts. A number of tool joints were welded using this manual, and exhaustive testing was conducted on them to ensure integrity, bonding and consistent hardness. In addition to this testing, Duraband ® is required to be casing wear tested, in this case by Mohr Engineering 3 , Houston, TX.

NS-1™ re-application certification is handled a little differently. The Duraband ® re-application procedures are examined. Tool joints with worn hardbanding products on them are then welded according to the re-application procedures. Appropriate sections are taken from the tool joint and tested for bonding, hardbanding integrity, hardness consistency and heat affected zone integrity.

Why is NS-1™ important? For the most part, hardbanding is a self regulated procedure, unless third party inspectors are employed during the process. In that respect, it is extremely important to have an outside party examine, evaluate, and regulate hardbanding products. Postle qualifies each and every applicator. Applicators are visited on a frequent basis for compliance to Postle Industries’ manual and procedures. Non-compliant applicators are reviewed and handled accordingly.