大小单双app下载

  • <tr id='IW2jua'><strong id='IW2jua'></strong><small id='IW2jua'></small><button id='IW2jua'></button><li id='IW2jua'><noscript id='IW2jua'><big id='IW2jua'></big><dt id='IW2jua'></dt></noscript></li></tr><ol id='IW2jua'><option id='IW2jua'><table id='IW2jua'><blockquote id='IW2jua'><tbody id='IW2jua'></tbody></blockquote></table></option></ol><u id='IW2jua'></u><kbd id='IW2jua'><kbd id='IW2jua'></kbd></kbd>

    <code id='IW2jua'><strong id='IW2jua'></strong></code>

    <fieldset id='IW2jua'></fieldset>
          <span id='IW2jua'></span>

              <ins id='IW2jua'></ins>
              <acronym id='IW2jua'><em id='IW2jua'></em><td id='IW2jua'><div id='IW2jua'></div></td></acronym><address id='IW2jua'><big id='IW2jua'><big id='IW2jua'></big><legend id='IW2jua'></legend></big></address>

              <i id='IW2jua'><div id='IW2jua'><ins id='IW2jua'></ins></div></i>
              <i id='IW2jua'></i>
            1. <dl id='IW2jua'></dl>
              1. <blockquote id='IW2jua'><q id='IW2jua'><noscript id='IW2jua'></noscript><dt id='IW2jua'></dt></q></blockquote><noframes id='IW2jua'><i id='IW2jua'></i>
                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 : 不锈钢封『头
                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