ASTM A333 Gr.8 Seamless Steel Pipe

lntroduction

Seamless pipe is a long strip of steel with a hollow section and no seams around the perimeter. The thicker the wall thickness of the product, the more economical and practical it is, the thinner the wall thickness, its processing cost will increase significantly; The process of the product determines its limited performance, and the accuracy of the general seamless steel pipe is low: the wall thickness is uneven, the brightness of the inner and outer surfaces of the tube is low, the cost of sizing is high, and there are pockmarks and black spots on the inner and outer surfaces that are not easy to remove; Its inspection and shaping must be processed offline. Therefore, it reflects its superiority in high pressure, high strength and mechanical structure materials.

Specification

Technical data

Classfication of carbon seamless steel pipe:
Types	Application
Structure Purposes	General structure and mechanical
Liquid Services	Petroleum, gas and other fluids conveying
Low and Medium Pressure Boiler Tube	Steam and boiler manufacturing
Hydraulic Pillar Service	Hydraulic support
Auto Semi-shaft Casing	Auto sem-shaft casing
Line Pipe	Oil and gas conveying
Tubing and Casing	Oil and gas conveying
Drill Pipes	Well drilling
Geological Drilling Pipe	Geological drilling
Furnace tubes, heat exchangers tubes	Furnace tubes, heat exchangers

Manufacturing process

According to different production methods, it can be divided into hot rolled pipe, cold rolled pipe, cold drawn pipe, extruded pipe, etc.
1. Hot rolled seamless pipe is generally produced on automatic pipe rolling unit. The solid tube blank is inspected and removed from surface defects, cut to the required length, centered on the perforated end face of the tube blank, and then sent to a heating furnace for heating and perforation on the perforator machine. In the perforation at the same time continuous rotation and forward, under the action of the roll and the head, the inside of the tube blank gradually forms a cavity, called capillary. It is then sent to an automatic pipe rolling machine for further rolling. Finally, the whole wall thickness of the whole machine is averaged, and the diameter is determined by the sizing machine to meet the specification requirements. The production of hot-rolled seamless steel pipes using continuous pipe rolling mills is a more advanced method.

2. If you want to obtain a smaller size and better quality seamless pipe, you must use cold rolling, cold drawing or a combination of both. Cold rolling is usually carried out in two-roll mills, where the steel pipe is rolled in an annular hole pattern consisting of a variable-section round hole groove and an immovable conical head. Cold drawing is usually carried out on a single-chain or double-chain cold drawing machine of 0.5~100T.

3. The extrusion method places the heated tube blank in a closed extrusion cylinder, and the perforated rod moves together with the extrusion rod to make the extruded part extrude from the smaller die hole. This method can produce steel pipes with smaller diameters.

FAQ

1.Q: Are you a factory or trading company?
A: We are professional manufacturer, and our company also is a very professional a trade company for steel products.We can provide a wide range of steel products.

2.Q:What do your factory do regarding quality control?
A: We have obtained ISO, CE and other certifications. From materials to products, we check every process to maintain good quality.

3.Q: Can I get samples before order ?
A: Yes, of course. Usually our samples are free. we can produce by your samples or technical drawings.

4.Q:How do you make our business long-term and good relationship?
A:We keep good quality and competitive price to ensure our customers benefit ; We respect every customer as our friend and we sincerely do business and make friends with them. No matter where they come from.

5.Q:what is your delivery time ?
A: Our delivery time is about one week, timing according to the number of customers.

Projects

Aluminum Pipe Application

Feb 07, 2023

Aluminum tubes are widely used in all walks of life, such as: automobiles, ships, aerospace, aviation, electrical appliances, agriculture, electromechanics, home furnishings, etc. Aluminum tubes have been ubiquitous in our lives.

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Stainless Steel Pipe Application

Feb 07, 2023

Stainless steel pipe is a kind of hollow long round steel, mainly widely used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industrial transmission pipeline and mechanical structure parts, etc., also widely used in the manufacture of mechanical parts and engineering structures. It is also commonly used as furniture and kitchenware, etc.

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Welded Pipe Application

Dec 27, 2022

Welded pipes are further divided into general welded pipes, galvanized welded pipes, oxygen blown welded pipes, electric wire casing, metric welded pipes, roller pipes, deep well pump pipes, automotive pipes, transformer pipes, electric welded thin-walled pipes, electric welded shaped pipes and spiral welded pipes according to their applications.

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Seamless Pipe Application

Feb 07, 2023

Seamless steel pipes are used in fluid transportation pipes, boiler plants, engineering, and mechanical processing plants.

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Carbon Steel Pipe Application

Feb 07, 2023

Carbon steel pipe carbon steel pipe is divided into two categories: hot-rolled and cold-rolled (drawn) steel pipe. The hot-rolled carbon steel pipe is divided into: ordinary steel pipe, low and medium pressure boiler steel pipe, high pressure boiler steel pipe, alloy steel pipe, stainless steel pipe, petroleum cracking pipe, geological steel pipe and other steel pipe.

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Aluminum Pipe Application

Feb 07, 2023

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Steel Pipe Pile Application

Feb 07, 2023

Steel pipe piles are suitable for foundations in wharf and harbor construction, and their diameters generally range from 400-2000mm, with the most commonly used at 1800mm.

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Steel Pipe Pile Application

Feb 07, 2023

Steel pipe piles are suitable for foundations in wharf and harbor construction, and their diameters generally range from 400-2000mm, with the most commonly used at 1800mm.

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Stainless Steel Pipe Application

Feb 07, 2023

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Seamless Pipe Application

Feb 07, 2023

Seamless steel pipes are used in fluid transportation pipes, boiler plants, engineering, and mechanical processing plants.

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Introduction to our quality control

Gnee steel group is a supply chain integrated enterprise including steel plate, coil, profile, outdoor landscape design and processing.

Patents

FAQ

We have a certain scale capacity to ensure your order delivery cycle.

Are you a factory or trading company?

We are professional manufacturer, and our company also is a very professional a trade company for steel products. We can provide a wide range of steel products.

Can I get samples before order ?

Yes, of course. Usually our samples are free. we can produce by your samples or technical drawings.

What is our quality inspection standard?

Our key qualities and services comprise of:
• Quality assured goods
• Multiple payment modes
• Experienced crew
• Prompt shipment
• Ethical business policies
• Wide distribution network

Which certifications have we acquired?

GNEE Steel Pipe has the following certification:
• GST CERTIFICATE
• CERTIFICATE OF INCORPORATION
• CERTIFICATE OF IMPORT EXPORT CODE
• ISO CERTIFICATE
• CE CERTIFICATE
• MANUFACTURING CERTIFICATE

Can GNEE Steel Pipe customise the design as per my requirement?

Yes, GNEE Steel Pipe specializes in precisely manufacturing products according to the customers unique needs and requirements.

GNEE Steel Pipe is strategically located to serve the entire country and the whole world’s Alloy Pipe, Low Temperature Pipe, Boiler&Heat exchanger Tube, high-strength structural pipe ,Stainless steel & carbon steel pipes/tubes, and pipe fittings’ requirements.

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Products

Seamless Pipe

Alloy Steel Pipe

Stainless Pipe

API 5L Pipe

Aluminum Pipe

Carbon steel Pipe

Square Tube

API Oil Pipe

Welded Pipe

Steel Pipe Pile