Hot Sale Low Price! 6 Inch Schedule 40 Black Carbon ERW Welded Steel Pipe

Spiral Welded Carbon Steel Pipe API 5L Uses Spiral Welded SSAW for Construction hot sale

According To The Amount Of The Carbon Content, Carbon Steels Can Be Divided Into Low-Carbon Steel, Medium-Carbon Steel And High--Carbon Steel.

Structural Steels Can Be Subdivided Into Constructional Steel And Machinery Steel. Low-Carbon Steel Is Often Used As Constructional Steel, And Low-Carbon And Edium-Carbon Steels Are Often Used As Machinery Steel.

Medium-Carbon And High-Carbon Steels Are Often Used As Tool Steel. Tool Steels Include Carbon Tool Steel, Alloy Tool Steel And High-Speed Tool Steel.  

Classification of welding methods (spiral welded steel pipe and spiral welded steel pipe)

According to different welding methods, it can be divided into arc welded pipe, high frequency or low frequency resistance welded pipe, gas welded pipe, furnace welded pipe, Bondi pipe, etc.

Electric welded steel pipe: used in oil drilling and machinery manufacturing, etc.

Furnace welded pipe: It can be used as water gas pipe, etc., large-diameter straight seam welded pipe is used for high-pressure oil and gas transportation, etc.; spiral welded pipe is used for oil and gas transportation, pipe piles, bridge piers, etc.

Classification by weld shape (straight seam welded pipe and spiral welded pipe)

Straight seam welded pipe has simple production process, high production efficiency, low cost and rapid development.

The strength of spiral welded pipe is generally higher than that of straight seam welded pipe. It can produce welded pipes with larger diameters from narrower billets, and can also use billets of the same width to produce welded pipes with different diameters. However, compared with the same length of straight seam pipe, the length of the weld is increased by 30~100%, and the production speed is lower. Therefore, most of the welded pipes with smaller diameters use straight seam welding, and most of the welded pipes with large diameters use spiral welding. Welded steel pipe refers to a steel strip or steel plate that is bent and deformed into a circular or square shape and then welded into a steel pipe with seams on the surface. The blank used for welded steel pipe is steel plate or strip steel.

There are long-term cooperative freight forwarders, various transportation methods.

1. Package: Standard seaworthy packages in bundles or as per requirement.

2. Shipping: we will arrange the shipping in about 10 days after the deposit is received.

With 17 years of experience in steel, our company has its own factory and professional team, which can provide you with high-quality products, competitive prices and professional services.

Runhai Steel Co., Ltd.

Runhai Steel Co., Ltd. is located in Jinan, Shandong Province. The company's products include stainless steel, seamless pipe, color coated plate, galvanized sheet, aluminized sheet, aluminum sheet, copper sheet and other profiles, building materials, pipe series. Products are widely used in chemical, pharmaceutical, electric power, railway, automotive, paper and construction engineering. The company has long-term close trade relations with Shandong Iron and Steel, Tangshan Iron and Steel, Handan Iron and Steel, Jinxi Iron and Steel and other well-known domestic steel companies.

The company has advanced wms, crm management system to ensure that our customers in the product consulting, procurement, ordering, use in the whole process without worry! Over the years, our company has won the trust of our customers with high-quality products, first-class service and ultra-low price. With the favor, our products are spread all over the country! Thanks to the support of new and old customers, Runhai people will work harder and enterprising, and return more customers with better and more efficient services!

1. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

2.what can you buy from us?
we can provide customized service of carbon steel plate ,coil ,pipe and bar.

3. what services can we provide?
Pre-sale Service
1. Sample can be offered with sample charge and courier fee by buyer's side.
2. We have full stock,and can deliver within short time.Many styles for your choices. 
3. Good Quality + Factory Price + Quick Response + Reliable Service, is
what we are trying best to offer you
4. All of our products are produce by our professional workman and we
have our high-work-effect foreign trade team, you cantotally believe our service. 

After you choose
1. We will count cheapest shipping cost and make invoice to you at once.
2. Check quality again, then send out to you at 1-2 working day after your payment,
3. Email you the tracking no, and help to chase the parcels until it arrive you.

After-sale choose
1. We are very glad that customer give us some suggestion for price and products.
2. If any question,please contact with us freely by E-mail or Telephone.