Seamless carbon steel pipes are made of steel ingots or solid billets through perforation to make capillaries, which are then hot-rolled, cold-rolled or cold-drawn. The raw material of Carbon Steel Pipe is a round tube blank, which is cut by a cutting machine into a billet with a length of about 1 meter, and sent to a furnace for heating through a conveyor belt. The billets are fed into the furnace and heated at about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a critical issue. After the round tube blank is released from the furnace, it is pierced through a pressure punching machine. Generally, the more common punching machine is the conical roller punching machine. This kind of punching machine has high production efficiency, good product quality, large amount of perforation and diameter expansion, and can wear a variety of steel grades. After perforation, the round tube blank is successively cross-rolled, continuously rolled or extruded by three rolls.
1. Seamless steel pipe for structure (GBT8162-2008). Mainly used for general structure and mechanical structure. Its representative material (brand): carbon steel, 20, 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.
2. Seamless steel pipes for conveying fluids (GBT8163-2008). It is mainly used for conveying fluid pipelines in engineering and large-scale equipment. The representative material (grade) is 20, Q345, etc.
3. Seamless steel pipes for low and medium pressure boilers (GB3087-2008) are used to manufacture various structures of low and medium pressure boiler superheated steam pipes, boiling water pipes and superheated steam pipes, large smoke pipes, small smoke pipes and arch bricks for locomotive boilers Hot-rolled and cold-drawn (rolled) seamless steel pipes of high-quality carbon structural steel for pipes. The representative material is 10, 20 steel.
Carbon Seamless Steel Pipe, Seamless Pipe, Seamless Steel Pipes TIANJIN YOUFA STEEL CO., LTD , https://www.cnyoufasteel.com
Product parameter:
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           SPECIFICATION OF LOW SPEED ELECTRIC CAR
1
Model
D503
2
Driving Type
Rear Drive
3
Overall Dimension L×W×H(mm)
2830×1320×1590
4
Body Structure
5 Doors and 3 Seats
5
Weight(Kg)
520
6
Wheel Base(mm)
1910
7
Front Tread(mm)
1075
8
Rear Tread(mm)
1015
9
Min. Ground Clearance (mm)
120
10
Maximum Speed(km/h)
35
11
One Charge Mileage
≥100
12
Maximum Climb Angle
10%
13
Charging Voltage (V)
220
14
Charge time (h)
6
15
Power consumption (kwh/100km)
8
16
Storeage Battery
80Ah/12V/Lead-acid Gel,  5 Pcs
17
Rated Power of Motor
DC, 1.0KW
18
Tyre
400-10
19
Spare tyre
400-10
20
Front/Rear Brake
Disc,Hydraulic
21
Aluminum rims
.
22
Cooling AC
.
Product features:
As a classic version of the upgrade, D503 product quality is no doubt, in the configuration of the new upgrade, but also fully consider the needs of users. If you need an easy to operate and reliable type four wheel electric vehicle, while D503 is a very good choice!
1, appearance
Shifeng D503 is independent of Shifeng group to create a classic small car body, full order mould, beautiful appearance, spacious interior, flexible and comfortable driving experience, products listed by the market's favor.
2, configuration
In humanized configuration, D503 increased the skylight and spare no effort, reverse image function, assembly intelligent voice alarm system, clear broadcast backing, high speed, medium speed and low speed tips, suggesting that vehicle anti-theft measures and open function, convenient use.
3, power
D503 is equipped with well-known brand maintenance free battery and intelligent motor controller, with strong power and reliable performance. The 60V1.0kW brushless DC motor with complete independent intellectual property rights can achieve reasonable matching and improve the performance of the whole vehicle. This model can be equipped with 60V/1.0kW high and low axle, low grade climbing powerful, high-grade flat road, fast speed, fast and convenient conversion.
4, features
D503 is the biggest characteristic of the steering wheel into the handle, the rear suspension adopts double trailing arm type independent suspension system, independent front suspension for Mcpherson type structure, balance performance is good, safe and comfortable.
 Company Introduction:
Overseas sales
1,Being No.1 for 15 years in China, for the production and sales of Agricultural Vehicles.
2,Being No.1 for 17 years in Chinese Agricultural Machinery industry, for the running Turnover and Profit.
3,Being No.1 in China, for the production and sales of Tractor, Single Cylinder Diesel Engine.
4,Most patents in Chinese Agricultural Machinery industry.
5,With 1800 Dealers in China and the world, most dealers cooperated for more than 15 years.
6,With 2000 Suppliers all over the world, built up the Strategic Partnership.
7,Casting &Â Foundry, Punching Pressing, Welding, Painting and Assembling Technology &Â Equipment is the best in Chinese same industry.
8,Shifeng is available to produce &Â sell 1.2 million units Agricultrual Vehicles, 1Â million units Agricultural Equipment, 120,000LCV trucks &Â Electric Car,120,000 tons Nylon Chemical Fiber &Â Tires, with the related supporting from Technology, Human Resource, Equipment &Â partners.
Our service
Pre-Sales Service
1. Inquiry and consulting support.
2. Sample testing support.
3.View our Factory.
After-Sales Service
1.Training how to install the machine, training how to use,maintain and repair the machine.
2.Engineers available to service machinery overseas.
FAQ
Q1.Are you manufacturer or trader?
We "Shandong Shifeng Group Co.,Ltd" located in "Shandong Province China  established on 18th May, 1993.
Q2.What is your terms of payment?
A:T/T 30% as deposit,and &70% before delivery.we will show you the photos of the products and packages before you pay the balance.
Q3.What your terms of delivery?
A:EXW,FOB,CFR,CIF,DAF.
Q4.How about your delivery time?
A:Generally,it will take about 14 days after receipt of deposit payment.The specific delivery time depends on the items and the quantity of your order.
Q5.Are you interested in dealership with local company?
A:Yes,we are quite interested in this business.we'd like to cooperate with some local partner to sell more products in local market and supply better service.
Q6.What is your warranty policy?
A:We can supply two years warranty for our products.We will provide parts as free within warranty.We can send engineer to customer place if big quality problem.We can provide internet or calling service at any time.
Q7.Do you test all your products before delivery?
A:Yes,we have 100% products test and complete quality control system defore delivery.
Q8.How do you make our business long-term and good relationship?
A:1.We keep good quality,competitive price and efficient service to ensure our customers benefit;
2.We protect the benefit of dealer or agent,in specifical period and region.
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Mini Electric Car for Sale/Electric Car/Electric Vehicle
Model NO.: D503
Model: D503
Vehicle Size: 2830×1320×1590
Wheelbase: 1910 mm
Maximum Speed: < 35 Km/H
Weight (Kg): 520
Body Structure: 5 Doors and 3 Seats
Min. Ground Clearance (mm): 120
One Charge Mileage: Above 100
Maximum Climb Angle: 10%
Trademark: SHIFENG
Transport Package: According to Customer′s Requirement
Specification: 2830× 1320× 1590
Origin: Gaotang, Country, Shandong, Provice
HS Code: 8703900010
 mini electrci car for sale