Boiler Header Manifold Welding on the site Vietnam Biggest Boiler
Company Sugar Mill Factory
1.The headers of boilers include water-cooling hinders of boilers
proper, economizer hinders, superheater hinders, etc.
2.They function for gathering, mixing and redistribution in boiler
systems. In structure, they include end cover hinders or necking
II. Product Description
1.In manufacturing, the key of end cover hinder is welding. Since
by manual arc welding, the weld joint is single-side welding
without quality guarantee at the ends.
2. In addition, due to large welding workload, frequent return for
repair and long working period, it became the throat process of the
whole hinder production.
3.When making hinders of the style, we adopt advanced production
technique, complete large equipment and mature technology,
especially automatic submerged arc welding between hinders and end
covers. 4.Such welding methods have high manufacturing efficiency,
good quality, beautiful welding shape, safety, reliability, etc.
1.The necking hinders of the Company are made by hot press and
retracting of seamless steel pipes at special hinder necking
2. In this way, the hinders will have thicker walls and cleaner
surface. The necking cover will form membrane stress rather than
bending stress with desired stress performance under the effect of
3.Many boiler factories have made stress test and bursting test.
4. The tests have reached the same conclusion: the stress in end
cover wall under working pressure is far lower than permissible
stress of the material.
5.The bursting pressure is over 20 times the working pressure
during cold blasting.
6.Without end cover, necking hinders have welding seams, large
strength margin, high hinder pressure as well as safe and reliable
7.As a result, necking hinders are very popular among the
manufacturers and users.
8.Checking hand holes of the hinders have welding style and mobile
Hinder proper (of large-diameter seamless steel pipes), end covers,
pipe joints, hand holes, thermometer jack, etc. During
manufacturing, welding test is conducted strictly in line with
welding technique to ensure 100% quality.
IV. Performance features
Excellent in welding quality, highly automatic, safe and reliable.
Warranty and after-sale service
HDB promises the top quality of every set of machine and best
after-sales service as followings :
|(A)||The boiler body guarantee is two years , for accessories three
|(B)||During the guarantee period , if the main body defective or broken
without wrong operating , HDB must replace the parts for free or
prepare the spare-parts for free.|
HDB should provide boiler technical service and operation guidance
for whole life long.
Regarding to the installation and training , the buyer should take
all the correlative charges (accommodation and food , round -trip
How's Quality Control
|1||Strength calculation report with applied materials information;|
|2||100%NDT(non-destructive inspection) report of steel plate, tube and
|3||100%X-ray inspection report (welding seam): to ensure the quality
of the entire boiler;|
|4||Hydraulic test report: ensure the standard working pressure and