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ASTM A333 Gr.8 Seamless Steel Pipe

Place of Origin:
China
Delivery Time:
22-30 days
Standard:
ASTM
Length:
12M, 6m, 6.4M, 1.5-6.5m
Section Shape:
Round
Tolerance:
±1%
Alloy Or Not:
Alloy
Sample:
Sample Freely
Shape:
Round.square.Rectangle
Type:
Seamless
lntroduction
Specification
Projects
Qualification
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.












Consult our expert technicians today for professional solutions.
Projects
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
Patents
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.
Tel: +86 -372-5055135
Email: info@gneetube.com
Whatsapp: +86 15822557385