我厂在为北京化工四厂制造丁辛醇装置的设备中,有一台文丘里清洗器。这台设备是由日本宇部兴产株式会社以反承包的形式,要我厂按ASME标准制造生产的。在这台设备中有一个关键部件是圆管分配器,此分配器要弯制的角度为340°(以下简称340°弯管)。弯管中心圆直径φ800mm,管子规格φ108mm×6mm,材料为SA312GrTP304L,见图1。按日方提供的 I plant in Beijing for the manufacture of four plants Octanol plant equipment, there is a venturi washer. This equipment is from Japan Ube Industries Co., Ltd. in the form of anti-contracting, to our factory according to ASME manufacturing standards. A key component in this equipment is the tube distributor, which is to be bent at an angle of 340 ° (hereinafter referred to as the 340 ° bend). Bending center circle diameter φ800mm, pipe size φ108mm × 6mm, material SA312GrTP304L, shown in Figure 1. Provided by the Japanese side