Spiral pipe, also known as spiral steel pipe or spiral welded pipe, is made by rolling low-carbon structural steel or low-alloy structural steel strip into a tube blank at a certain spiral angle (called forming angle), and then welding the tube seams. It can produce large-diameter steel pipes with narrower strip steel.
Characteristics of spiral pipe: The production process of straight seam welded pipe is simple, the production efficiency is high, the cost is low, and the development is rapid. The strength of spiral welded pipe is generally higher than that of straight seam welded pipe. It can produce welded pipes with larger diameters with narrower billets, and can also produce welded pipes with different diameters with billets of the same width. However, compared with straight seam pipes of the same length, the weld length increases by 30~100%, and the production speed is lower. Therefore, most smaller diameter welded pipes use straight seam welding, while large diameter welded pipes mostly use spiral welding.
Spiral pipes are mainly used in tap water projects, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, and urban construction. They are one of the 20 key products developed in China. For liquid transportation: water supply, drainage, sewage treatment projects, mud transportation, and marine water transportation. For gas transportation: coal gas, steam, and liquefied petroleum gas. For structural use: as piling pipes, bridges; pipes for docks, roads, and building structures, marine piling pipes, etc.
| OD |
219mm(8")- 3520mm(138") |
| WT |
0.8-25.5mm |
| Length |
0.3-18m( customized) |
| Standard |
API 5L PLS1&PLS2, ASTM A252, AS1163 |
| Grade |
API 5L : GR B, X42,X46, X56, X60,X65,X70
ASTM A252 Grade 250
AS1163 C350 |
| Surface |
Black painting, Varnish painting, bare pipe, Oiled,customized coating(3LPE/FBE/Concrete Weight Coating/Insulation Coatin/Bitumen Coating) |
| Package |
1. not bundled, in loose piece
2. customized requirement |
| Usage |
Oil&GAS INDUSTRY/ CONSTRUCTION/PILING/MINING SEWAGE TRANSMISSION etc. |
Carbon steel pipe: It is made of 10, 20, 30, 35, 45 high-quality carbon steel, 16Mn, 5MnV and other low-alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other alloy steels hot-rolled or cold-rolled. Seamless pipes made of 10, 20 and other low-carbon steels are mainly used for fluid delivery pipelines. Seamless pipes made of 45, 40Cr and other medium-carbon steels are used to manufacture mechanical parts, such as stress-bearing parts of automobiles and tractors. Generally, carbon steel pipes must ensure strength and flattening tests. Hot-rolled steel pipes are delivered in hot-rolled or heat-treated states; cold-rolled steel pipes are delivered in heat-treated states.
Square tube is a name for square tube and rectangular tube, that is, steel tube with equal and unequal side lengths. It is made by rolling steel strips through processing. Generally, the steel strips are unpacked, flattened, curled, and welded to form round tubes, which are then rolled into square tubes and cut into required lengths.
Seamless Steel Pipe the wall thickness of the product, the more economical and practical it is. The thinner the wall thickness, the higher the processing cost. Secondly, the process of the product determines its limited performance. Generally, seamless steel pipes have low precision: uneven wall thickness, low brightness of the inner and outer surfaces of the pipe, high cost of cutting, and pitting and black spots on the inner and outer surfaces are difficult to remove. Thirdly, its detection and shaping must be processed offline. Therefore, it has demonstrated its superiority in high pressure, high strength, and mechanical structure materials.
Spiral pipes are mainly used in water supply projects, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, and urban construction. They are one of the 20 key products developed in China. For liquid transportation: water supply, drainage, sewage treatment projects, mud transportation, and marine water transportation. For gas transportation: coal gas, steam, and liquefied petroleum gas. For structural use: as pile pipes, bridges; pipes for docks, roads, building structures, and marine pile pipes, etc.
Galvanized steel pipe is a welded steel pipe with hot-dip or electroplated zinc layer on the surface. Galvanizing can increase the corrosion resistance of steel pipes and extend their service life. Galvanized pipes are widely used. In addition to being used as pipeline pipes for general low-pressure fluids such as water, gas, and oil, they are also used as oil well pipes and oil pipelines in the petroleum industry, especially offshore oil fields, oil heaters, condenser coolers, coal distillation and washing oil exchangers for chemical coking equipment, as well as pier piles and support frames for mine tunnels.
Ductile iron pipe is a type of cast iron pipe. The quality requirement is that the spheroidization level of cast iron pipe should be controlled at level 1-3 and the spheroidization rate should be greater than 80%, so the mechanical properties of the material itself are well improved, with the essence of iron and the performance of steel. The metallographic structure of ductile iron pipe after annealing is ferrite plus a small amount of pearlite, with good mechanical properties, excellent anti-corrosion performance, good ductility, good sealing effect, easy installation, and mainly used for water supply, gas transmission, oil transmission, etc. in municipal and industrial and mining enterprises
SHANDONG BAOTAI METAL MATERIALS GROUP CO.,LTD was Located in Jinan, the capital of Shandong Province. Mainly engaged in stainless steel, carbon
steel, galvanized steel, PPGI, PPGL, copper, aluminum. Our team has focused on the steel industry for 15 years. The company has
established long-term close cooperative relations with well-known domestic steel companies. At the same time, the company's annual
spot reserve exceeds 1000,000 tons, so we can guarantee a short delivery time. Baotai Steel provides services for large
enterprises such as domestic government construction projects, Chinese listed companies, and state-owned enterprises. High-quality
products, low prices, and high-quality services are highly praised by customers. Customers from various countries have signed
agency agreements with Baotai Steel and become Baotai Steel's agents. Baotai Steel's service team is online 24 hours a day to
provide you with professional and high-quality services. At the same time, Baotai Steel also adheres to the concept of win-win,
customer-centric, and looks forward to becoming your trustworthy and high-quality enterprise.
Q1: What is your MOQ?
A: Usually our MOQ is one container, but it is different for some items, please contact us for details.
Q2:What is your terms of payment?
A:We usually accept T/T in advance, L/C for large sum.If you prefer other payments terms, please discuss.
Q3:What is your delivery time?
A:For products in stock, we can ship it within 7 days after receiving the deposit. For custom order, production time is 15-30 workdays after received the deposit.
Q4:How could you guarantee your products?
A:Mill Test Certification is supplied with shipment, We also accept and support the third-party inspection.We also could issue the warranty to customer to guarantee the quality.
Q5: Will all costs be clear?
A:Our quotation is easy to understand and will not incur any additional costs.
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