Please Choose Your Language
You are here: Home / Blogs / What Are the Factors that Affect the Accuracy of Stainless Steel Welded Pipe's Outer Diameter?

What Are the Factors that Affect the Accuracy of Stainless Steel Welded Pipe's Outer Diameter?

Views: 0     Author: Site Editor     Publish Time: 2021-09-14      Origin: Site

Inquire

Stainless steel welded pipe refers to a steel pipe with strict internal and external dimensional accuracy (tolerance range), good internal and external surface finish, roundness, straightness, and uniform wall thickness. The main technical indicators of stainless steel welded pipe produced by this technology have reached or partially exceeded the national Standard GB12771-2002 and standard ISO4394/I-1980 (E) requirements. How to control the accuracy of stainless steel welded pipe is a key issue.

Due to the relatively high surface density of stainless steel welded pipes, even if the outer surface is not polished, it can generally reach about 260 mesh. If the stainless steel welded pipe is polished internally and externally, its straightness will decrease. Therefore, if there are special requirements for the straightness of the steel pipe, polishing is generally not recommended. The polished surface of the stainless steel welded pipe is already very bright. The cold-rolled stainless steel welded pipe has excellent comprehensive performance, can withstand high pressure, cold-formed, flared, and flattened without cracking or wrinkling. It can do various complex deformations and mechanical processing. After the stainless steel welded pipe is vacuum annealed, the steel pipe can be processed.

Stainless steel welded pipes are generally used to manufacture mechanical structures, hydraulic equipment, machinery and other production fields. In the fields of instrumentation, medical equipment, precision equipment, electronic equipment, aerospace, thin-walled water supply pipelines and heat exchangers, the welded pipes used are required to have high outer diameter dimensional accuracy. Ordinary welded pipe mills cannot meet this requirement. SEKO Machinery takes you to analyze how welded pipe equipment and production factors affect the dimensional accuracy of stainless steel welded pipe outer diameter.

1. The dimensional accuracy requirements of high-precision stainless steel welded pipes
    From GB/T 3639-2000 "Cold-drawn or cold-rolled precision seamless steel pipes" and ASTM A1016, GB/T 12770-2002 "Stainless steel welded pipes for mechanical structures" and other standards, it can be seen that the relevant standards have an impact on precision stainless steel welded pipes. Allowable deviation of diameter (table 1) and wall thickness deviation (table 2) requirements. The inner diameter tolerance of welded pipe is mainly affected by outer diameter tolerance and wall thickness tolerance. This article does not discuss the issue of inner diameter tolerance.

2. Analysis of factors affecting the dimensional accuracy of the outer diameter of stainless steel welded pipes
2.1 The influence of steel strip thickness and width accuracy
  
2.2 The outside diameter tolerance of welded pipe before sizing and the influence of sizing amount
    1) Dimension tolerance of welded pipe outside diameter before sizing
    The outer diameter tolerance of the welded pipe before sizing is affected by the superposition of many factors such as the tolerance of the steel strip, the dimensional accuracy of the welding roll and its gap.

    2) The influence of sizing amount on the dimensional accuracy of welded pipe outer diameter
    The sizing amount of high-precision welded pipe should be slightly larger than that of ordinary welded pipe. The principle of determining the sizing amount is: ①The sizing amount should be greater than the tolerance of the outer diameter of the welded pipe before the diameter; ②Sufficient sizing amount and pass times.

2.3 The frame stiffness of the sizing machine and the influence of equipment size

2.3.1 Frame stiffness
      The elastic deformation of the base of the welded pipe sizing machine is equal to the sum of the elastic deformation of a series of stressed parts in the base.

2.3.2 Sizing rolling force

     1) Average unit pressure
     2) Contact area
     3) Sizing rolling force

2.3.3 Elastic deformation of the sizing machine base

2.4 The influence of sizing machine equipment manufacturing accuracy
    The equipment manufacturing accuracy of the sizing machine directly affects the outer diameter tolerance of the welded pipe

The accuracy of the thickness and width of the steel strip only affects the accuracy of the outer diameter of the welded pipe before sizing, but not much during the sizing process. The sizing pass and the sizing amount are mainly determined according to the outer diameter tolerance of the welded pipe before sizing. Sufficient sizing pass and sizing amount are the basic guarantee for improving the outer diameter accuracy of the welded pipe finished product. The main factors affecting the accuracy of the outer diameter of the welded pipe are the size of the sizing machine and the accuracy of the equipment manufacturing. Hangao Tech (SEKO Machinery) precision high-speed stainless steel industrial pipe machine, model and mold design are precisely controlled, and a series of processes including welding forming, annealing bright, precise sizing, etc. can be completed online, which can meet 24-hour continuous production. For more details, please consult!

Related Products

Every time the finishing tube is rolled, it must go through the process of solution treatment. Ta ensure that the performance of the steel pipe meets the technical requirements. and to provide guarantee for the post-process processing or use. Bright solution treatment process of ultra-long seamless steel pipe has always been a difficulty in the industry.

Traditional electric furnace equipment is large,covers a large area, has high energy consumption and large gas consumption, so it is difficult for realize bright solution process. After years of hard work and innovative development, the use of current advanced induction heating technology and DSP power supply. Precision control of heating temperature to ensure that the temperature is controlled within t2C,to solve the technical problem of inaccurate induction heating temperature control. The heated steel pipe is cooled by "heat conduction"in a special closed cooling tunnel, which greatly reduces the gas consumption and is more environmentally friendly.
$ 0
$ 0
Explore the versatility of Hangao's Stainless Steel Coil Tube Production Line. Tailored for various applications, from industrial processes to specialized manufacturing, our production line guarantees the seamless fabrication of high-quality stainless steel coil tubes. With precision as our hallmark, Hangao is your trusted partner for meeting diverse industry requirements with excellence.
$ 0
$ 0
Embark on a journey of hygiene and precision with Hangao's Stainless Steel Fluid Tube Production Line. Tailored for sanitary applications in pharmaceuticals, food processing, and more, our cutting-edge machinery ensures the highest standards of cleanliness. As a testament to our commitment, Hangao stands out as a manufacturer where tube production machines boast exceptional cleanliness, meeting the stringent requirements of industries that prioritize purity in fluid handling systems.
$ 0
$ 0
Explore the myriad applications of titanium tubes with Hangao's Titanium Welded Tube Production Line. Titanium tubes find critical utility in aerospace, medical devices, chemical processing, and more, owing to their exceptional corrosion resistance and strength-to-weight ratio. As a rarity in the domestic market, Hangao takes pride in being a stable and reliable manufacturer for titanium welded tube production lines, ensuring precision and consistent performance in this specialized field.
$ 0
$ 0
Dive into the realm of precision with Hangao's Petroleum and Chemical Tube Production Line. Crafted for the rigorous demands of the petroleum and chemical industries, our production line excels in manufacturing tubes that meet the stringent standards required for transporting and processing crucial materials in these sectors. Trust Hangao for reliable solutions that uphold the integrity and efficiency vital to petroleum and chemical applications.
$ 0
$ 0
Experience the epitome of technological advancement with Hangao's Laser Stainless Steel Welded Tube Production Line. Boasting accelerated production speeds and unparalleled weld seam quality, this high-tech marvel redefines stainless steel tube manufacturing. Elevate your production efficiency with laser technology, ensuring precision and excellence at every weld.
$ 0
$ 0

If Our Product Is What You Want

Please get in touch with our team immediately to answer you with a more professional solution
WhatsApp:+86-158-1561-9854 
Tel: +86-139-2821-9289 
E-mail: sales6@hangaotech.com 
Add: No. 23 Gaoyan Road, Duyang Town, Yun 'anDistrictYunfu City. Guangdong Province

Quick Links

About Us

Login & Register

Guangdong Hangao Technology Co., Ltd. is China's only one with high-end precision industrial welded pipe production line full set of equipment manufacturing capabilities.
Leave a Message
Contact Us
Copyright © 2023 Guangdong Hangao Technology Co., Ltd. All Rights Reserved. Support by leadong.com | Sitemap. Privacy Policy