Please enable JavaScript.
Coggle requires JavaScript to display documents.
Impact testing, UCS-66 - Coggle Diagram
-
UCS-66
(i) For components made of Part UCS materials that are impact tested, Figure UCS-66.1 provides a basis for the use of these components at an MDMT colder than the impact test temperature.
-
-
-
-
-
(c) Impact testing is not required for the ferritic steel
flanges shown below when they are produced to finegrain practice and supplied in the heat-treated condition (normalized, normalized and tempered, or quenched and tempered after forging) when used at design temperatures no colder than –20°F (–29°C) and no colder than 0°F (–18°C) when supplied in the as-forged condition.
-
(3) long weld neck flanges, defined as ...
-
(e) The material manufacturer’s identification marking required by the material specification shall not be stamped on plate material less than 1/4 in. (6 mm) in thickness unless the following requirements are met.
-
-
-
(a) Unless exempted by the rules of UG-20(f) or other
rules of this Division, Figure UCS-66 shall be used to establish impact testing exemptions for steels listed in Part
UCS.
-
(2) Examples of the governing thickness for some typical vessel details are shown in Figure UCS-66.3.
(f) Materials, other than bolting materials, having a
specified minimum yield strength greater than 65 ksi (450 MPa) shall be impact tested. However, they may be used at temperatures colder than the minimum design metal temperature as limited in (1) and (2) below.
-
-
(b) When the coincident ratio defined in Figure
UCS-66.1 is less than one, Figure UCS-66.1 provides a basis for the use of components made of Part UCS materials
to have a colder MDMT than that derived from (a) above without impact testing. Use of Figure UCS-66.1 is not per-
mitted for bolts and nuts.
(d) No impact testing is required for Part UCS materials
0.10 in. (2.5 mm) in thickness and thinner, but such exempted Part UCS materials shall not be used at design metal temperatures colder than −55°F (−48°C). For vessels or components made from NPS 4 (DN 100) or smaller
tubes or pipe of P‐No. 1 materials, the following ...
(g) Materials produced and impact tested in accor-
dance with the requirements of the specifications listed in Figure UG-84.1, General Note (c), are exempt from ...
(h) No impact testing is required for metal backing
strips which remain in place made of materials assigned to Curve A of Figure UCS-66 in thicknesses not exceeding 1/4 in. (6 mm) when the minimum design metal temperature is −20°F (−29°C) or warmer.
(j) When the base metal is exempt from impact testing by (g) above or by Figure UCS-66, Curve C or Curve D, −20°F (−29°C) is the coldest MDMT to be assigned for welded components that do not meet the requirements of UCS-67(a)(3).