GB/T 9711 SSAW Steel Pipe
GB/T 9711 SSAW (SSAW steel pipe) is a type of spiral submerged arc welded steel pipe, also known as spiral submerged arc welded seamless steel pipe. Shunchen Industry is a manufacturer specializing in producing GB/T 9711 SSAW. The GB/T 9711 SSAW of Shunchen Industry uses hot-rolled steel plates as the basic material. Through a forming machine, the pipe blank is rolled into a tubular shape according to the set spiral angle, and then double-sided submerged arc automatic welding is performed on the inner and outer surfaces to complete the entire manufacturing process.The main functions of GB/T 9711 SSAW are to transport fluids (such as oil, natural gas, and water) and provide structural support (such as building pile foundations and steel structure construction). It can adapt to various complex working conditions and solves the pain points of traditional pipeline materials in large-diameter, long-distance transportation applications.
Key Selling Points
Spiral welded pipes, as high-performance engineering pipes, have the following core advantages: they offer excellent overall cost performance and reliable quality. The production of large-diameter pipes using narrower steel plates results in a 6%-8% increase in material utilization, allowing for a 10%-25% reduction in wall thickness under the same pressure conditions, thereby significantly reducing costs. The unique spiral weld design ensures more uniform stress distribution and stronger pressure-bearing capacity. Combined with the double-sided submerged arc welding process, the one-time qualification rate of the welds exceeds 99.2%, providing excellent crack resistance and leak prevention performance. Additionally, the production process is flexible, enabling the manufacture of various specifications ranging from 219mm to 4064mm in outer diameter, which can meet different engineering requirements. It also supports continuous high-efficiency production and rapid customized supply. The pipes can also undergo professional anti-corrosion treatment according to the working conditions, offering strong weather resistance and corrosion resistance. They have undergone strict multiple tests and international certifications, fully meeting the comprehensive requirements for economy, adaptability, and long-term stability in high-pressure, complex environments, and large-scale long-distance engineering projects.
Technical Specifications
The technical specifications for GB/T 9711 SSAW steel pipes can be customized according to engineering requirements. The core standards, materials, dimensions, and testing requirements are as follows, covering mainstream application scenarios while also considering both general and specific aspects:
| category | project | Description / Standard / Material |
| (Ⅰ)Implementation Standards | domestic standards | GB/T 3091, GB/T 9711, SY/T 5037, SY/T 5040, GB/T 13793, etc. |
| International Standards | API 5L (PSL1/PSL2), ASTM A53/A252, EN 10217/EN 10219, JIS G3457, IS 3589, etc. | |
| (II) Core Materials | carbon steel | Q235 (Grade A/B), 20# steel; suitable for applications such as low-pressure fluid transportation and general structural support. |
| Low alloy high strength steel | Q345 (Grades A/B/C), Q355B, API 5L Gr.B / X42 / X46 / X52 / X56 / X60 / X65 / X70, EN S235JR / S275JR / S355JR, etc.; suitable for medium and high voltage transmission, piling, and industrial high voltage applications. Among them, Q355B and X52 are commonly used materials, balancing strength and economy. |
Key Dimensional Parameters (Customizable)
| Parameter name | Normal range | illustrate |
| Outer diameter (OD) | 219mm - 4064mm | The mainstream diameter range is 219mm-3000mm, but larger diameters can be customized according to requirements. For example, the Chongzuo project commonly uses pipes with an outer diameter of 820mm. |
| Wall thickness (WT) | 3.2mm - 40mm | Agricultural irrigation typically uses ≥8mm thickness, while industrial steam transportation requires thicker thickness. For general transportation applications, 6mm-25mm is commonly used. |
| length | 3m - 48m | Standard pipe lengths range from 6m to 12m, with custom-made extra-long pipes available to reduce on-site welding joints and lower the risk of leakage. |
| Pipe diameter tolerance | ≤0.12% | Ellipticity ≤1%, deflection <1/2000, dimensional accuracy, no additional straightening required. |
| End processing | Plain edge, bevel edge, threaded edge | It can be used with LTC/STC/BTC/VAM and other connection methods to adapt to different construction needs and facilitate on-site installation and splicing. |
| Surface treatment | Black pipe, rust-preventive oil, anti-corrosion coating | Anti-corrosion coatings can be customized (FBE, 3PE, coal tar epoxy, etc.) to suit different corrosive environments and extend service life. |
Application Domains and Cases
GB/T 9711 SSAW steel pipes, with their flexible specifications, strong pressure-bearing capacity, and high cost-effectiveness, are widely used in various fields such as energy transportation, municipal engineering, construction infrastructure, industrial production, and agricultural irrigation. The following are specific application scenarios and real cases, accompanied by scenario explanations:(一) Application FieldsSSAW spiral welded steel pipes are widely used in various fields such as oil and gas transportation, municipal water supply and drainage, construction foundation piling, industrial production, and agricultural irrigation. In the field of oil and gas transportation, they are suitable for long-distance, high-pressure, and complex geological conditions of crude oil, natural gas, and refined oil pipeline projects on land and at sea. Customized anti-corrosion and low-temperature treatment can be provided to ensure safe and stable operation in extreme environments. In the municipal water supply and drainage field, they are compatible with large-diameter, medium-low pressure water supply, sewage, and rainwater pipelines, meeting the laying requirements for urban roads, rivers, and complex conditions, effectively reducing construction costs and cycles. In the construction and piling fields, they are used as foundation piles and steel structure supports for bridges, high-rise buildings, and docks in engineering projects. They are made of high-strength low-alloy steel such as Q355B and X42, with excellent bearing, impact resistance, and settlement resistance. In the industrial production field, they can be used for steam, hot water, and chemical medium transportation, and as boiler flue and equipment supporting pipelines. Customized anti-corrosion and insulation coatings can be applied to adapt to high-temperature, high-pressure, and corrosive working conditions. In the agricultural irrigation field, they are used as main pipelines for farmland, orchards, and pastures, with excellent corrosion resistance, anti-aging properties, and low maintenance costs, enabling long-term stable and efficient water transportation in outdoor complex environments.（二）(II) Real engineering cases Case 1: Main Water Supply Network Project of Chongzuo Cross-border Industrial Park
Project Requirements: Water supply for the cross-border industrial park needs to be adapted to the complex laying conditions of red soil hills. The requirements are for the pipe material to be leak-proof, corrosion-resistant, and to balance cost and supply cycle, replacing the originally planned straight seam steel pipe;
Selected Specifications: SSAW steel pipe, outer diameter 820mm, wall thickness 10mm, material Q355B, surface adopts fusion-bonded epoxy powder (FBE) internal anti-corrosion + polypropylene adhesive tape external protection system;
Usage Scale: Cumulative supply of over 2,800 meters, all used for the main water supply network of the industrial park, covering the entire cross-border park and surrounding supporting areas;
Project Feedback: Construction is convenient, adapted to the laying requirements of the hills, no leakage or corrosion phenomenon so far, significantly reducing construction costs and cycle, verifying the applicability and reliability of SSAW steel pipe in medium-pressure municipal pipelines.
Case 2: Jinan "Yellow River Water Supply" Municipal Project
Project Requirements: Main pipeline for urban Yellow River water supply, transporting water from the Yellow River to the eastern new district. The pipeline needs to have a large diameter, medium-low pressure transportation, precise pipe material dimensions, corrosion resistance, and be suitable for laying under urban roads;
Selected Specifications: SSAW steel pipe, outer diameter 2020mm (DN2000), wall thickness 14mm, material Q235B, surface treated for anti-corrosion and rust prevention;
Usage Scale: Total length 32 kilometers, covering multiple areas of the eastern new district in Jinan, undertaking the main water supply task;
Project Feedback: The pipe material dimensions are precise, the on-site welding efficiency is high, there is no leakage problem, it is suitable for urban municipal construction scenarios, ensuring stable water supply for residents and enterprises in the new district, and the cost performance is far superior to traditional pipe materials.
Packaging and Shipping
The packaging and shipping of GB/T 9711 SSAW steel pipes strictly follow industry standards, taking into account product protection, transportation convenience, and cost control. Customized packaging plans are made based on pipe specifications, transportation distances, and customer requirements to ensure that the products are delivered intact to the site. The specific requirements are as follows:
(1) Packaging Standards (Customized by specification, with anti-damage and anti-rust features)
| category | Specifications range | Packaging method and instructions |
| Small size | Outer diameter ≤ 500mm, length ≤ 12m | Hexagonal bundling packaging is used, with each bundle weighing no more than 2000 kg. Multiple steel straps are used to secure the bundles to prevent loosening or collisions during transportation. Plastic plugs or protective caps are installed at both ends of the steel pipes to prevent foreign objects and moisture from entering the pipes. The surface is wrapped with waterproof paper, PVC tubing, or burlap and reinforced with steel straps. Two identification labels are affixed to each bundle, indicating the product name, specifications, material, length, batch number, and manufacturer information for easy counting and acceptance. |
| Large size | Outer diameter > 500mm, length > 12m | Bulk packaging (unbundled to avoid surface damage); thickened plastic plugs or metal protective sleeves are installed at both ends of the steel pipes, with special attention to protect the pipe edges to prevent collision deformation and scratches; the surface is coated with anti-rust oil or wrapped with anti-corrosion film, and for long-term outdoor storage, additional waterproof tarpaulin is used to prevent rust caused by sun and rain; each steel pipe is clearly marked with key information such as specifications, material, and batch number for easy on-site identification. |
| Special requirements | Customization requirements | For export orders, fumigation packaging and waterproof packaging are available to meet international transportation standards. For pipes with special anti-corrosion coatings such as 3PE and FBE, an additional protective film is added during packaging to prevent scratches or damage to the coating. Specific markings, logos, or warning labels (such as "moisture-proof" or "collision-proof") can be added to the packaging according to customer requirements. |
(II) Shipping-related Instructions
| project | Content Description |
| Transportation methods | Flexible options are available based on order volume and transportation distance: for short distances (≤500km), flatbed trucks are used to ensure the pipes are securely fixed; for long distances (>500km), dedicated logistics lines, container transport (small sizes), or oversized transport vehicles (large sizes) are used, with full reinforcement and protection to avoid severe bumps and tipping; for export orders, sea freight or multimodal transport is used, in accordance with international transport standards, and dedicated personnel are assigned to monitor the logistics status throughout the process. |
| Delivery time | Standard specifications (outer diameter 219–3000mm, wall thickness 6–25mm) are in ample stock and will be shipped within 3–7 business days after order confirmation; customized specifications (special diameter, wall thickness, material or anti-corrosion treatment) have a delivery cycle of 15–30 days. Urgent orders can be coordinated for priority production and shipped in as little as 10 business days to ensure project progress. |
| Goods inventory and acceptance | Before shipment, we will check the specifications, materials, quantity, and packaging integrity of each item and take photos of the actual product and packaging for customer confirmation. The shipment will be accompanied by complete documents such as product certificate, test report (e.g., EN 10204 / 3.1B), delivery note, and material certificate. If the customer finds any damage, shortage, or non-compliance with specifications upon receipt, we will respond within 24 hours, verify the information, and promptly reissue, replace, or negotiate compensation. |
| Special Transportation Instructions | For extra-long and extra-large diameter pipes (length > 20m, outer diameter > 3000mm), transportation routes should be planned in advance, oversized transport procedures should be handled, and professional escort vehicles should be arranged. In winter and rainy seasons, waterproof and antifreeze measures should be strengthened. For remote areas, delivery can be coordinated with nearby logistics outlets. If direct delivery to the construction site is required, the entry conditions can be communicated in advance, and suitable vehicles can be arranged. |
| After-sales guarantee | We will be responsible for any damage caused by improper packaging or transportation, and will provide free replacement or repair. If any non-human-caused quality problems are found after the customer's acceptance, we will provide a solution within 48 hours upon presentation of the test report and photos of the actual product, to effectively protect the customer's rights. |
Choosing Shunchen GB/T 9711 GB/T 9711 SSAW steel pipes offers you the core performance advantages such as superior pressure-bearing strength, optimal stress distribution, and flexible specification customization. The double-sided submerged arc welding process is combined with the entire process quality control, ensuring stable weld quality and the ability to customize various anti-corrosion schemes. It is suitable for various working conditions such as high pressure and harsh environments. At the same time, the product has high metal utilization rate, lower comprehensive cost, customizable length design, which significantly improves transportation and installation efficiency. The standardized production line ensures controllable delivery cycle. Regular orders can be shipped quickly. Moreover, it has the advantages of full-process traceability, compliance with multiple industry standards, and comprehensive customization services. It is also equipped with professional packaging logistics and timely after-sales technical support. The entire production-to-delivery chain is guaranteed for protection. It is suitable for engineering needs in various fields such as oil and gas transportation, municipal water supply and drainage, building structures, power and chemical industries, etc. It helps projects reduce costs, increase efficiency, and deliver safely and efficiently. It is a cost-effective and reliable choice for various engineering scenarios.
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Shunchen Industrial Co., Ltd., Anzhuangzi Industrial Park, Xizhaizhuang Town, Jinghai District, Tianjin,China
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