摘要:
A rigid riser system including a rigid riser and one or more fatigue performance enhancers. The rigid riser includes a plurality of rigid metal sections welded together to form a plurality of girth weld joints. The one or more fatigue performance enhancers are positioned over one or more of the plurality of girth weld joints of the rigid riser to enhance the fatigue resistance and/or fatigue life. The body of the fatigue performance enhancer may include a central region and two end regions with the central region having a greater average radial cross-sectional thickness than each of the end regions. Methods of enhancing fatigue performance of the rigid riser and fatigue performance enhancers are also disclosed.
摘要:
Die vorliegende Erfindung betrifft ein Blechbauteil (1), insbesondere einer Abgasanlage, mit einem aus wenigstens zwei Schalen (3, 4) bestehenden Körper (2), mit wenigstens einem Rohr (5), wobei zumindest zwei Schalen (3, 4) entlang aneinander anliegender Stoßkanten (8, 9) miteinander verbunden sind, wobei zumindest zwei Schalen (3, 4) einen rohrförmigen, am Rohr (5) außen anliegenden Anschlussbereich (10) bilden, in den sich die miteinander verbundenen Stoßkanten (8, 9) dieser Schalen (3, 4) hinein erstrecken, wobei das Rohr (5) mit einer Schweißnaht (11) mit diesen Schalen (3, 4) verbunden ist, die sich entlang eines bezüglich der Längsrichtung (13) des Rohrs (5) stirnseitigen, das Rohr (5) umschließenden Rands (12) der Schalen (3, 4) im Anschlussbereich (10) erstreckt Um die Dauerfestigkeit des Blechbauteils (1) zu verbessern, sind die Schalen (3, 4) im Anschlussbereich (10) so gestaltet, dass sie darin über ein Längsende (14) der Stoßkanten (8, 9) in der Längsrichtung (13) des Rohrs (5) vorstehen und voneinander beabstandet sind.
摘要:
Der Erfindung liegt das Problem zugrunde eine Verbindungstechnik zu schaffen, mit der in einfacher, sicherer und kostengünsiger Weise dünnwandige Rohre aus Titan oder einer Titanlegierung verbunden werden können. Hierzu sind Preßfittings vorgesehen mit sickenförmigen, einen Dichtring aufnehmenden Ende, wobei dieser mittels eines Preßwerkzeuges im kalten Zustand form- und kraftschlüssig mit dem Rohrenden verbunden wird.
摘要:
A rigid riser system including a rigid riser and one or more fatigue performance enhancers. The rigid riser includes a plurality of rigid metal sections welded together to form a plurality of girth weld joints. The one or more fatigue performance enhancers are positioned over one or more of the plurality of girth weld joints of the rigid riser to enhance the fatigue resistance and/or fatigue life. The body of the fatigue performance enhancer may include a central region and two end regions with the central region having a greater average radial cross-sectional thickness than each of the end regions. Methods of enhancing fatigue performance of the rigid riser and fatigue performance enhancers are also disclosed.
摘要:
The present disclosure provides a method for reducing ovality in pipe for joining to pipe components by using a plug coupled on an inside surface of the pipe and a sacrificial component coupled to the end of the pipe to establish a coupling interface. The plug, the sacrificial component, or a combination thereof assists in minimizing ovality changes during use of the pipe, particularly at the end of the pipe. When the pipe is to be coupled with a pipe component, the pipe and sacrificial component are separated at a different location than the coupling interface along the pipe in proximity to the plug. The plug is left coupled to the sacrificial component, and generally slidably engaged with the pipe. The plug and the sacrificial component can be removed from engagement with the pipe. The pipe and the pipe component can be coupled together.
摘要:
A solar collector system is provided including a bearing assembly comprising a plurality of wheels or rollers for rollingly engaging a large-diameter support element. Rotation of the large-diameter support element supports tracking of the position of the sun relative to the solar collector system. The bearing assembly may be pre-assembled to the large-diameter support element before the solar collector system leaves the factory, thereby facilitating assembly of the solar collector system in the field, even under adverse conditions.
摘要:
A pipeline is a pipeline having plural weld zones in which ends of plural steel pipes are joined by welding, the plural steel pipes are produced from plural charges of molten steel having one or more steel compositions; yield point elongation is not present on a stress-strain curve obtained when stress is applied in a longitudinal direction of each of the steel pipes; a thickness of each of the steel pipes t (mm) and an average pipe outside-diameter D (mm) satisfy t/D×100‰¤6; and in the plurality of the weld zones, ”YS which is a yield strength difference between one steel pipe and the other steel pipe that are welded to each other (MPa), and YR representing a yield ratio that is a ratio of the yield strength to tensile strength of a pipe having a lower yield strength out of the one steel pipe and the other steel pipe, satisfy ”YS‰¤-1.75×YR+230.