Distinguished guests, experts, good morning everyone!
On the occasion of the 3rd China Zhengzhou International Abrasives Grinding Exhibition, we gathered here to hold the first Synthetic Diamond International Cooperation and Innovation Development Forum. Here, first of all, on behalf of the Superhard Materials Branch of the China Machine Tool Industry Association, I would like to express my warm welcome and heartfelt thanks to all of you.
The theme of this forum is innovation and development. Innovation is the soul of enterprise development, the source of promoting industrial restructuring, accelerating transformation and upgrading, and achieving sustainable development. In the process of actively implementing and accelerating the promotion of China's super-hard materials in our industry, we have encountered difficulties in the adjustment of the country's macro-economy and the downward pressure on the economy. The development of the industry has been under unprecedented pressure. We also see that industry companies are actively increasing investment in scientific research, improving innovation capabilities, improving product quality, and promoting the transformation and upgrading of the industry. Synthetic diamonds are typical representatives of technological innovation and a shining pearl of this forum. Today, we will conduct research on the technology of synthetic diamonds, share the technical achievements of experts, and promote technological advancement in our industry. Hosting this forum is also an innovation of the association's service model. The association is committed to serving the needs of the service. We will communicate with you and work hard to serve you.
Here, we would like to express our sincere gratitude and deep respect to all the super hard people who have contributed to the technological progress of the industry. We are grateful to Huajing for all the efforts made in this forum. They have made every aspect of the forum exquisite and provided us with a very good platform. Finally, I wish this forum a complete success, thank you! (Forum live recording feed)

Boiler Tube

Boiler tube - for pressure equipment, used at higher temperatures

Standards and steel grades,
Tube sizes acc. to EN, DIN, BS, NF A, UNI, STN, ÄŒSN and PN-H standards,
Tube sizes acc. to GOST and TU standards,
Tube sizes acc. to ANSI standards,
Tube sizes acc. to ASME standards,
Precision tube sizes.

Boiler tube is made from heat resisting carbon and low alloyed steels which can withstand the load at high pressure and temperature. Boiler tube is used for parts of energy type equipment such as boilers, steam superheaters, steam pipelines, etc. The tubes are supplied as hot rolled or cold drawn. Specifications, dimensions and the steel grades are shown in a separate overview.
Boiler tube dimensions and tolerances

The tube dimensions range from 10.2 mm to 139.7 mm, from 26.9 mm diameter and the wall thickness from 2.6 mm and they supplied as hot rolled. The smaller diameter tubes and the thick wall tubes of larger diameters are supplied as cold drawn and subsequently they are heat treated. The tubes delivery in this condition happens only if there is an agreement upfront at the time of ordering the tubes. Based on an agreement it is possible to deliver boiler tubes with dimensions and tolerances according to the dimensional specifications for precision tubes. The tube dimensions meet the requirements of the following EN 10216-2, DIN 2448, BS 3059-1, BS 3059-2, BS 3602-1, BS 3604-1, NF A 49-211, NF A 49-213, UNI 4991, STN 42 5715, STN 42 5716, ÄŒSN 425715, ÄŒSN 42 5716, GOST 8732, PN-H 74252, ANSI B36.10, ASME B36.10. The detailed dimensional overview is shown in the tables according to EN, DIN, BS, NF A, UNI, STN, ÄŒSN and PN-H standards, GOST standards, TU standards, ANSI standards, ASME standards and standards for precision tubes.

Length of the boiler tube

Diameter (OD) [mm] Wall (WT) [mm] Length (L) [m]
OD < 60,3 5 – 6
OD => 60,3 WT < 7,1 5 – 6 or 10 – 14 after an agreement 22,4
WT => 7,1 5 – 6
Types of the length of supplied tubes: (a) random, (b) fixed ± 500 m, (c) exact + 15 / - 0 mm.

Boiler tube straightness

Straightness deviation for the whole length of a tube can not exceed value of 0.0015 x L. In conversion to the 1 meter length it can not exceed 3 mm.

Ends of the boiler tubes

The ends of the tubes are vertical to the longitudinal axis and are without burrs.

Condition of the tubes surface

The tubes condition corresponds to the requirements of appropriate standards, heat treatment to the way of tube manufacturing and chemical composition of steel.

Marking of the tubes and tube bundles

The tubes with the outside diameter up to 51 mm are marked with a label that is attached to the bundle. Larger tubes are marked at least at a one end of a tube by the necessary data.

Surface protection of the boiler tubes

While ordering, it is necessary to agree upon the way and means of temporary protecting the surface of the tubes during transportation and storing. The tubes may be supplied without temporary preservation of the surface, or with the preservation of the surface with an agreed upon preservative.

Packaging of the boiler tubes

The tubes are supplied in packages with a circular or hexagonal diameter with weight of 300 to 3500 kilograms. The tubes are bound with a steel band. It is possible to arrange wrapping to plastic sheet, burlap or to wooden crates.

Inconel 625 Boiler Tube,Alloy 825 Boiler Tube,Waste Heat Boiler Tube,Alloy Steel Boiler Tubes,ASME SA213 Seamless Tube

YUHONG HOLDING GROUP CO.,LIMITED , https://www.alloypipeline.com