Items tagged with CREEP Files

File size: 2.09 MB Download

Density of loose-fill insulation material exposed to cyclic humidity conditions (NT TR 565)

NT TR 565

  • This report presents a proposal for a standardised method for creep tests and the empirical framework necessary for determining the density for volume-stable state of a granulated loose-fill material as a function of the applied stress when exposed to a climate characterised as cyclic humidity conditions.

File size: 1.26 MB Download

Creep of granulated loose-fil insulation - Test method and round robin test (NT TR 491)

NT TR 491

  • This report presents a proposal for a standardised method for creep tests and the necessary theoretical framework that can be used to describe creep of a granulated loose-fill material. Furthermore results from a round robin test are shown.

File size: 6.32 MB Download

Guidelines for evaluating in-service creep damage (NT TR 302)

NT TR 302

  • To indicate safe life or re-evaluation periods for high-temperature components, assessment based on measured creep cavitation damage is used worldwide. To interpret the observed damage unambiguously requires evaluation of the extent of damage on a unique, clearly defined and accepted scale. The presently available European damage scales in the guidelines NORDTEST NT TR 170 and VGB-TW 507 provide reference micrographs for a range of creep damage in the most common high-temperature steels. However, these guidelines differ in their stated and implicit definitions of a given class (extent) of damage, although both guidelines are nominally based on the same original Neubauer scale of creep damage.

File size: 1.13 MB Download

Metallographic assessment of the temperature history and remanent life of power plant components (NT MAT 002)

NT MAT 002

  • This NORDTEST method describes how oxide thickness measurements and/or metallographic investigations (changes in carbide distribution) can be used to assess the temperature history of superheater and reheater tubes.

Nordtest

Nordtest is a trademark of Nordic cooperation in conformity assessment. The emphasis of Nordtest is to develop, promote and innovate Nordic test methods and pre-normative activity. Nordtest endeavours to remove technical barriers to trade and promotes the concept: “Approved once, accepted everywhere”.