Based on plenty of account data, engineering estimated formulas for plastic limit internal pressure were fitted for welded pipebranch junction with incomplete penetration along intersecting line.
基于大量计算数据，拟合得出整圈未焊透三通量纲一塑性极限内压工程估算公式。
2
Developed excogitates of two decumbence and one horizontal molding die realized the increasing height of branchpipe of heat pressure tee.
研发出了两个横梁和一个水平成型模具，实现了热压三通支管高度的增加。
3
Duct branch is rich in natural form of uniform distribution, wall smooth, branchpipe and tube diameter on the transition to a flat.