GB 3087 Grade 20 Seamless Boiler Tubes

GB 3087 Grade 20 refers to a specific grade of seamless carbon steel boiler and superheater tubes according to the Chinese National Standard GB 3087. These tubes are designed for high-pressure and high-temperature applications, commonly used in boilers and heat exchangers.

standard:GB

Surface :1. Galvanized 2. Black and Color Painting

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introduction

No. 20 steel seamless steel pipe GB/T3087 is a common steel pipe material with high strength and good corrosion resistance. It is widely used in petroleum, chemical industry, electric power, construction and other fields.
The outer diameter of the 20-gauge seamless steel pipe is 273 mm and the wall thickness is 9 mm. At the same time, other geometric dimensions and physical properties of this steel pipe material are also specified, such as length, curvature, pressure resistance, etc. These regulations are very important to ensure the quality and reliability of steel pipes.
The production process of No. 20 steel seamless boiler steel pipes mainly includes smelting, rolling, heat treatment and other links. First, add molten iron to the electric furnace and add appropriate amounts of carbon, silicon, manganese and other elements for smelting. Then, the refined molten steel is injected into the rolling mill for rolling to form a tube blank. Finally, heat treatment is performed to improve the strength and corrosion resistance of the steel pipe.

Technical Data

Chemical composition of Grade 20 pipe

Grade	Chemical Composition(%)
Grade	C	Si	Mn	P	S	Cr	Cu	Ni
20	0.17～0.23	0.17～0.37	0.38～0.65	≤0.030	≤0.030	0.3～0.65	≤0.25	≤0.30

Mechanical properties of GB 3087 Grade 20 steel pipe

Grade	Wall thickness (mm)	Tensile strength (MPa)	Yield Strength (MPa)	Elongation %
			≥
20	＜15	410～550	245	20
	≥15		225

Steel grade	steel pipe outer diameter expansion rate,%
	Inside diameter / outer diameter
	≤0.6	＞0.6-0.8	＞0.8
10	12	15	19
20	10	12	17

company advantage

Gnee Steel Pipe Co., Ltd. is an industrial and trading company. We mainly produce and operate carbon steel pipes and alloy steel pipes. Our pipes include liquid delivery pipes, structural pipes, hydraulic strut pipes, boiler pipes and bearing pipes. We typically have over 5,000 tons of pipe in various sizes and standards. Our stock pipe sizes range from 20mm to 406mm outer diameter and 2mm to 70mm wall thickness.

FAQ
1.Q: Are you a manufacturers and what is your production capacity?
A: Yes, we are manufacturers. We have our own factory and our owncompany. I believe we will be the most suitable supplier for you Large scalefactory.
2.Q: What product information do I need to provide?
A: You need to provide the grade, width, thickness, coating and tonnage you need to buy.
3.Q. How can I learn about your quality assurance?
A.Visiting our factory is the best way to understand each other.