Founded in 2013, Yantai Xinbaoshang Materials Technology Co., Ltd.
China's leading LSAW pipe manufacturer and supplier
Longitudinal Submerged Arc Welded pipes (LSAW pipes) are manufactured by bending and forming steel plates into a cylindrical shape and then welding along the longitudinal seam using submerged arc welding technology. Unlike seamless steel pipes, the welded seam of LSAW pipes undergoes additional ultrasonic testing and heat treatment to enhance the pipe's strength and integrity. Due to their specialized production process, LSAW pipes offer larger diameter specifications and are capable of handling higher pressure applications compared to other pipe types. LSAW pipes are available in various materials, including high-strength carbon steel, low-temperature steel, and corrosion-resistant alloy steel, allowing selection based on specific environmental and application requirements. Surface treatments such as internal coating or external anti-corrosion layers enhance performance and extend service life in extreme conditions. Due to their excellent mechanical properties and reliability, LSAW pipes are widely used in long-distance oil and gas pipelines, marine structures, piling works, and other heavy industrial sectors.
Carbon steel longitudinal submerged arc welded pipes are primarily composed of iron-carbon alloys and do not contain other alloying elements. Based on carbon content, they can be classified into low-carbon steel, medium-carbon steel, and high-carbon steel. As carbon content increases, strength and hardness improve, but ductility and weldability decrease. longitudinal submerged arc welded pipes offer excellent strength and toughness, capable of withstanding high pressure loads. They also exhibit good machinability and weldability, making them widely applicable. The disadvantage of carbon steel longitudinal submerged arc welded pipes is its relatively poor corrosion resistance, making it susceptible to oxidation and corrosion in humid or extreme environments. Therefore, in certain extreme operating conditions, secondary treatments such as epoxy coating or hot-dip galvanizing are typically required to enhance durability. Due to its relatively low cost and reliable performance, carbon steel longitudinal submerged arc welded pipes are extensively used in industries such as construction, machinery manufacturing, and oil and gas transportation.
Stainless steel longitudinal submerged arc welded pipes are primarily made from carbon steel with the addition of chromium alloy elements to enhance their corrosion resistance and high-temperature resistance. The higher the chromium content, the stronger the corrosion resistance. This material has a smooth surface and excellent oxidation resistance, capable of withstanding corrosion from various chemical substances. It performs exceptionally well in extreme environments such as humid or corrosive soils, making it suitable for a wide range of high-demand applications, including chemical processing, food processing, pharmaceuticals, and marine engineering. It is particularly important in medical devices and the food industry. Although stainless steel longitudinal submerged arc welded pipes have relatively high costs, their high durability and low maintenance costs make them an ideal choice for many specialized applications.
Alloy steel longitudinal submerged arc welded pipes are manufactured by adding other alloy elements (such as chromium, nickel, molybdenum, tungsten, etc.) to an iron-carbon alloy base. Stainless steel is also a type of alloy steel. The primary characteristics of this material are its excellent strength, toughness, and wear resistance, enabling it to perform exceptionally well under high-temperature, high-pressure, corrosive, and extreme environmental conditions. Alloy steel pipes are designed to meet specific application requirements and are commonly used in industries such as petroleum, natural gas, chemicals, aerospace, and nuclear energy. Alloy steel longitudinal submerged arc welded pipes offer higher safety and reliability. Due to their unique composition and production process, alloy longitudinal submerged arc welded pipes typically have higher costs. However, their long-term durability and performance advantages make them an indispensable material in many high-end applications.
LSAW pipe and SSAW pipe are both manufactured using the SAW (Submerged Arc Welding) process. However, their manufacturing methods and processes differ. LSAW pipe employs a longitudinal welding process, made from a single sheet of steel plate, offering higher strength and pressure-bearing capacity. SSAW pipe utilizes a spiral welding process, typically formed from steel coils, with a spiral-shaped weld seam. SSAW pipes have relatively lower production costs and are suitable for manufacturing large-diameter pipelines. However, due to their longer weld seams, they exhibit relatively lower precision and pressure-bearing capacity.
As a leading manufacturer and supplier of longitudinal submerged arc welded pipe products in China, our products cover most application scenarios in terms of size and standards. Our products strictly comply with international standards such as API and ASTM. If you have any other requirements for product specifications, please feel free to contact us for customization.
| Outer Diameter Range | 21mm – 1422mm |
| Wall Thickness Range | max 48mm |
| Length Range | SRL , DRL , fixed length such as 6m , 12m , etc. |
| Carbon steel pipes | API 5L , ASTM A53/A53M , ASTM A135/A135M , ASTM A178/A178M , ASTM A214/A214M , ASTM A250/A250M , ASTM A333/A333M , ASTM A334/A334M , ASTM A513 , ASTM A671/A671M , ASTM A691/A691M , EN 10210-1 , EN 10217 , EN 10219-1 , EN 10255 , EN 10296-1 , JIS G 3444 , JIS G 3454/3456 , JIS G 3460 , JIS G 3462 , JIS G 3464 , etc. |
| Stainless steel pipes | ASTM A213/A213M , ASTM A268/A268M , ASTM A269/A269M , ASTM A312/A312M , ASTM A688/A688M , ASTM A803/A803M , EN 10216-5 , EN 10296-2 , JIS G 3459 , JIS G 3463 , JIS G 3446 , etc. |
| Alloy steel pipes | ASTM A213/A213M , ASTM A335/A335M , etc. |
We have two pipe product manufacturing bases in Yantai, Shandong Province. One of them, the General Pipe Manufacturing Base, has a history of nearly 70 years and is equipped with five hot-rolling production lines and one cold-drawing production line, with an annual production capacity of up to 500,000 tons. Leveraging our mature production processes and economies of scale, our product range encompasses over 1,000 specifications of pipe products, fully compliant with international standards such as API 5L, ASTM A106, and ASTM A333. While ensuring quality, we also offer a leading price advantage.
Our high-standard pipeline product production base has a stable production capacity of 800,000 tons, primarily producing high-grade steel products such as API 5L X100 PSL2, API 5CT Super 13Cr, and ASTM A335 P91. Our product specifications cover a wide range, with a maximum outer diameter of 20 inches, a wall thickness of up to 70 millimeters, and a single-piece length of up to 36 meters, capable of meeting the demands of steel pipes in various harsh operating conditions.
FAQs
We have no minimum order quantity requirements. Even if you only need one steel pipe or one pipe fitting, we can deliver on time and provide comprehensive services. Please note that certain high-grade steel products may require temporary production scheduling, which may result in minimum order quantity requirements. For specific details, please consult our sales team.
Of course, we provide free samples for products priced below $1,000. You only need to cover the shipping costs. For products priced above $1,000, please contact our sales team to discuss specific fees.
For products that are in stock, we will complete the final processing, quality inspection, packaging, and other steps within two weeks and deliver them as soon as possible according to the shipping schedule. For products that need to be ordered for production, an additional 2-3 weeks of production time will be required depending on the quantity requested.
In addition to providing factory warranty certificates, we can also provide test reports from internationally recognized quality testing agencies such as SGS, TUV, and DNV upon customer request. We are also available to assist third-party testing agencies with process inspections and final inspections prior to shipment.
Of course! Whether it's our own factory, processing plant, or our partners' factories, we welcome you to visit and exchange ideas at any time. If you need our assistance with visa matters, please feel free to contact our sales manager.
We are both a supplier and a manufacturer. We have three processing plants and warehouses, as well as a seamless steel pipe factory. We also collaborate closely with other outstanding steel pipe and pipe fitting factories in China, enabling us to offer a wide range of product specifications and a complete product system.
The delivery of the product is just the beginning of our service. If you encounter any issues during use, please feel free to contact our online customer service team at any time, and we will address the matter promptly. Additionally, we have offices in Hong Kong, Thailand, and Malaysia, enabling us to provide on-site technical support as needed.
Resource integration and supply chain capabilities are our core strengths. We offer a wide range of product specifications and numerous product types. At the same time, our inventory and processing capabilities ensure the fastest delivery times. We also provide professional customized solutions and comprehensive after-sales service.
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Our comprehensive supply chain system and robust resource integration capabilities form the core strengths of our customer service. Through strategic investments and deep partnerships, we have established a robust supply network with multiple premium manufacturers, creating a comprehensive system covering the full range of products including steel pipes, pipe fittings, flanges, and more. This enables you to source products of various specifications through a single point of contact, significantly saving time and coordination costs. Leveraging our deep insights into local markets and sustained procurement volumes, we deliver higher-quality products at comparable price points, helping you maintain a competitive edge in the marketplace.
To ensure rapid delivery, we maintain three large-scale warehousing and processing facilities in Yantai, Shandong and Cangzhou, Hebei, with a year-round inventory of no less than 35,000 tons. We provide comprehensive pipeline processing services including cutting, beveling, and anti-corrosion treatment. Leveraging mature local industrial clusters and supporting infrastructure, we efficiently complete the entire process—from inventory allocation and custom fabrication to quality inspection and packaging/shipping—within one week, fully safeguarding your project schedule and supply security.
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Consistent product quality is the foundation upon which we have earned the long-term trust of numerous partners. We consistently prioritize product quality above all else, strictly adhering to international standards and contractual specifications. Every product is accompanied by a comprehensive quality inspection report. We can flexibly add customized testing items based on your specific requirements or arrange for on-site verification by third-party inspection agencies to ensure all delivered products fully meet your expectations and specifications.
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We maintain a 20-member professional technical support team providing round-the-clock services including technical consultation, customized solutions, product quotations, freight coordination, and after-sales support. To strengthen our overseas sales network, we have established international offices in Hong Kong, China; Bangkok, Thailand; and Kuala Lumpur, Malaysia. Our team members possess extensive industry experience and professional technical qualifications. Through continuous process optimization, we ensure rapid response and effective handling at every stage.
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Southeast Asia’s steel industry is undergoing a structural transformation. Governments and private investors across Indonesia, Vietnam, Malaysia, and Thailand are expanding domestic steelmaking capacity to improve supply security and reduce reliance on imported commodity-grade products. New electric arc furnaces, rolling facilities, and pipe fabrication plants have enabled regional producers to increasingly serve construction, water infrastructure, and low-pressure industrial segments.
Galvanized steel pipe, with its unique physical properties and high cost-effectiveness, has become the material of choice for such demanding conditions.
Low-carbon steel pipe refers to steel pipe with a carbon content typically ranging from 0.05% to 0.25%. Depending on its carbon content, it is also known as “mild steel pipe.”
Hot rolling and cold drawing are the two most common production processes for seamless steel pipes. Although both produce seamless steel pipes, they exhibit significant differences in physical properties, dimensional appearance, and price.
Recently, Yantai XinbaoShang Materials Technology Co., Ltd. (hereinafter referred to as “YANTAIPIPE”) welcomed an important client from the Middle East for an on-site visit. The purpose of this visit was to conduct on-site inspection of prior orders and engage in in-depth discussions on further deepening strategic cooperation and expanding the scope of pipe fitting products.
Steel pipes are primarily classified by material into carbon steel pipes, alloy steel pipes, and stainless steel pipes, each possessing distinct advantages and disadvantages.
China steel pipe suppliers offer outstanding advantages in pricing, quality, and delivery reliability, making them the top choice for pipeline material procurement.
Introduction In steel pipe procurement, specifications serve as the core metrics determining product compatibility, cost, and project feasibility. Amo…
Southeast Asia’s steel industry is undergoing a structural transformation. Governments and private investors across Indonesia, Vietnam, Malaysia, and Thailand are expanding domestic steelmaking capacity to improve supply security and reduce reliance on imported commodity-grade products. New electric arc furnaces, rolling facilities, and pipe fabrication plants have enabled regional producers to increasingly serve construction, water infrastructure, and low-pressure industrial segments.
Galvanized steel pipe, with its unique physical properties and high cost-effectiveness, has become the material of choice for such demanding conditions.
Low-carbon steel pipe refers to steel pipe with a carbon content typically ranging from 0.05% to 0.25%. Depending on its carbon content, it is also known as “mild steel pipe.”
Hot rolling and cold drawing are the two most common production processes for seamless steel pipes. Although both produce seamless steel pipes, they exhibit significant differences in physical properties, dimensional appearance, and price.
Steel pipes are primarily classified by material into carbon steel pipes, alloy steel pipes, and stainless steel pipes, each possessing distinct advantages and disadvantages.
China steel pipe suppliers offer outstanding advantages in pricing, quality, and delivery reliability, making them the top choice for pipeline material procurement.
Introduction In steel pipe procurement, specifications serve as the core metrics determining product compatibility, cost, and project feasibility. Amo…
Introduction If you’re seeking a reliable Chinese steel pipe suppliers but lack procurement experience in China, feeling overwhelmed by numerous…
Recently, Yantai XinbaoShang Materials Technology Co., Ltd. (hereinafter referred to as “YANTAIPIPE”) welcomed an important client from the Middle East for an on-site visit. The purpose of this visit was to conduct on-site inspection of prior orders and engage in in-depth discussions on further deepening strategic cooperation and expanding the scope of pipe fitting products.
On July 28, 2025, we formally signed a 2,000-ton seamless steel pipe contract with our Italian client. This order complies with the EN10216-2 P235GH s…
We have successfully fulfilled a 1,000-ton order for seamless steel pipes from our South Korean client. The customer has expressed high praise for our product quality and delivery speed, further solidifying our cooperative relationship.
On the occasion of the National Day and Mid-Autumn Festival double holiday, Yantai Xinbaoshang expressed gratitude and care for its employees through heartwarming activities and special benefits, uniting the team to jointly wish our nation prosperity and a bright future.
We successfully secured a 500-ton order for seamless steel pipes with our Turkmenistan client. Through efficient land transportation, the shipment was delivered smoothly. The client highly praised our product quality and service, further solidifying our long-term cooperative relationship.
On September 3, 2025, Xinbaoshang Company hosted a warm birthday celebration for Jessica, showcasing our “people-oriented” corporate culture. We wish her both professional and personal success in the coming year!
On September 3, 2025, the military parade marking the 80th anniversary of the victory in the War of Resistance Against Japanese Aggression, held at Tiananmen Square in Beijing, not only highlighted the significant contributions made by the Chinese people in the fight against fascism but also profoundly embodied the spirit of the nation, inspiring us to remember history and look toward the future.
The United States plans to impose a 50% tariff on Indian goods starting August 27. This move stems from India’s imports of Russian oil and may have far-reaching implications for U.S.-India trade relations and the global economy.
Our pipeline products and services have been extensively deployed in major global energy projects, serving numerous international energy giants. These include CNPC, Sinopec, Shell, Total, as well as national oil companies in Kuwait, Azerbaijan, Abu Dhabi, Qatar, Algeria, and Saudi Arabia. Whether you operate as an EPC contractor or a distributor agent, our products and services consistently meet your stringent standards.
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