亚洲中文字幕无码一区二区三区 ,成人性色生活片免费毛片,亚洲成av人片大线观看

亚洲视频一区,亚洲激精日韩激情欧美激情精品 ,中文人妻无码一区二区三区,a网站免费观看,一区二区水蜜桃,中文字幕无码Av在线看,午夜男人天堂,亚洲色婷婷六月亚洲婷婷6月

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

News Up Next

Products

: Elliptical head

: Butterfly head

: Spherical head spin edge

: Flat Head

: Spherical head

: Bow bottom head

: Conical head

: Spherical cap shaped head

: Insulation panel

: Expansion Joints

: Jacket (cylinder) rotation side

: Manhole flange

Home Head Series Products News Parameter Company Profile Contact Us Company Culture

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