Customized Alloy Steel Headers And Manifolds ASME Standard Red Painted

Customized Alloy Steel Headers And Manifolds ASME Standard Red Painted

Product Description

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 hinders.

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 machine.

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 inner pressure.

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 performance.

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 style.

III. Material

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 :

How's Quality Control

Hua Dong Boiler Co., Ltd. is a high-tech enterprise specialized in manufacturing boilers. Established in early 1985s, has two manufacturing bases, this company covers 400,000㎡ with fixed assets amounting to USD 110,000,000. There are 1100 employees including 150 technicians and 600 coded welders. Hua Dong holds the manufacturing licenses for Grade A boilers and Grade A1&A2 pressure vessels issued by Chinese General Administration of Quality Supervision, Inspection and Quarantine; also it holds the "S" and "U" "NB" stamps issued by American Society of Mechanical Engineers; meanwhile, this Company has passed the certification of ISO9001, SO3834, EN12952 Quality Management System.

"Hua Dong" boilers include Utility Boiler, HRSG Boiler, coal-fired , oil(gas) -fired, coal-water-slurry-fired and garbage-fired steam/hot water boilers, organic heat carrier boilers, etc., and Boiler spare parts (Economizer, Finned tube, Header, Steam drum, Superheater, Water wall panel, Air preheater, Cyclone separator, etc., which are widely used in power generation, heat supply, chemical engineering, textile, food, paper, road building, plastic, rubber and wood working industries. "HD" boilers are honored as "Famous Production in Jiangsu Province", " Jiangsu High-Tech Product" and "Jiangsu Energy-Saving Product". "HD" brand is a "Famous Brand in Jiangsu Province". We are a qualified supplier for the top three boiler manufacturers in China(Harbin Boiler Co., Ltd., Dong Fang Boiler Group Co., Ltd., Shanghai Boiler Works Ltd.,). So far, Hua Dong Boilers have served 10000 customers, which sell well all over China and are exported to USA, Australia, Russia, Kazakhstan, India, Indonesia, South Africa, Brazil, and Southeast Asia.

We strive to manufacture "Safe, Efficient, Energy-Saving and Environment-Friendly" boilers, provide new-type products in excellent quality, serve users sincerely to their satisfaction, and be a top supplier of boilers in China.

Declaration

Zhangjiagang Hua Dong Boiler Co.,Ltd has no subsidiaries. 

Packaging & Shipping

Company Business

Our products have been wildly used in power plants and large international companies overseas.