网站久久久丨韩国毛片基地丨在线永久无码不卡av丨亚洲一区二区色情苍井空丨二区不卡丨交换交换乱杂烩系列yy丨免费观看日本污污ww网站丨欧美35页视频在线观看丨av美女网站丨亚洲日韩精品一区二区三区丨欧美日韩123丨国产公妇仑乱在线观看丨青青草原综合久久大伊人丨亚洲精品色情app在线下载观看丨聚色视频丨美女18禁永久免费观看网站丨精品久久久久久狼人社区丨免费视频爱爱太爽了网站丨法国伦理少妇愉情丨强美女免费网站在线视频

Service Hotline
086-577-86923687
Current Location:Home - News - Products Knowledge
Comparison Process head cold and hot processing
Release Time:2011-10-26  Views :
Processing head is generally divided into cold and hot working are two, compare the following three aspects of the two paper processing head were:
 
A, head cold material deterioration does not occur, especially suitable for processing stainless steel head;
Thermal processing material deterioration will occur, resulting in decreased corrosion resistance of stainless steel head, stainless steel head is not suitable for processing.
B, cold will not change the size of the contraction caused by cooling, regular shape, size, accuracy and consistency;
Hot forming mold can cause thermal expansion and contraction of the cooling head, the size difference is difficult to control and consistency.
C, to maintain the surface after head cold forming smooth surface of the original material, beautiful appearance.
Surface oxide formed after thermal processing head of serious and difficult to remove.
Key Words : 不銹鋼封頭
Products
Elliptical head
Elliptical head
Butterfly head
Butterfly head
Spherical head spin edge
Spherical head spin edge
Flat Head
Flat Head
Spherical head
Spherical head
Bow bottom head
Bow bottom head
Conical head
Conical head
Spherical cap shaped head
Spherical cap shaped head
Insulation panel
Insulation panel
Expansion Joints
Expansion Joints
Jacket (cylinder) rotation side
Jacket (cylinder) rotation side
Manhole flange
Manhole flange
NAVIGATION
Wenzhou Shangshang Metal Products Co., Ltd.
Add : 208,Zhanhong Road,Dushan,Longwan CentralIndustry,Wenzhou
Tel : 086-577-86923687 85981288  Fax : 086-577-86913687
All Rights Reserved © 2016 Wenzhou Shangshang Metal Products Co., Ltd    Zhejiang ICP No. 08,005,782
  • Follow Us

    Follow Us