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Hemaokang Steel (Shandong) Co., Ltd. is pleased to offer this ASTM A312 304/304L stainless steel seamless pipe, specifically manufactured for chemical transfer line applications. Produced under ISO9001 quality management systems, each 6-meter pipe combines the inherent strength of a seamless structure with a practical welded end finish, enabling easier field installation and long-term service reliability. This product meets the requirements of modern chemical plants, refineries, and water treatment facilities where safe and efficient fluid transfer is critical.
Stainless steel grades 304 and 304L are among the most widely selected materials for corrosive media conveyance. The dual certification allows this pipe to satisfy both structural and welding-performance requirements. The low carbon content of 304L minimizes the formation of chromium carbides during welding, which is essential for maintaining corrosion resistance in the heat-affected zone. As a result, the pipe is well suited for transporting acids, alkalis, solvents, and other chemical process fluids.
The following key features make this seamless pipe an appropriate choice for chemical transfer projects:
- Seamless construction: The absence of a longitudinal weld seam eliminates a common weak point, providing uniform mechanical strength throughout the pipe body.
- Dual certified 304/304L: Combines high strength and excellent intergranular corrosion resistance after welding, with broad code acceptance.
- ASTM A312 compliance: Follows industry-standard specifications for seamless and welded austenitic stainless steel pipe, ensuring traceability and consistency.
- Welded end finish: Pipe ends are prepared to facilitate smooth welded connections, reducing installation time and improving joint integrity.
- 6-meter fixed length: Reduces the number of joints required in a pipeline, lowers installation cost, and simplifies storage and inventory management.
- Excellent corrosion resistance: Resists a wide range of organic and inorganic chemicals, making the pipe durable in harsh environments.
- High temperature performance: Suitable for both ambient and elevated temperature services, within the limits defined by ASTM A312.
- Smooth inner surface: Minimizes pressure drop and reduces the risk of scaling or fouling for efficient fluid flow.
The table below presents the general specifications of the supplied pipes. Customized sizes and additional processing are available upon request.
| Parameter | Typical Value / Range |
|---|---|
| Material | 304/304L stainless steel (dual certified) |
| Manufacturing Standard | ASTM A312 |
| Product Type | Seamless pipe |
| Outer Diameter | 1/2 inch to 24 inches (custom sizes available) |
| Wall Thickness | Schedule 10S through Schedule XXS (wall thickness customizable) |
| Length | 6 meters (other lengths on request) |
| End Preparation | Welded finish / beveled ends |
| Surface Condition | Annealed and pickled, or welded finish as specified |
| Application | Chemical transfer lines, process piping, oil and gas, water treatment |
| Quality System | ISO9001 certified factory |
Why choose our ASTM A312 304/304L seamless pipe?
This product is manufactured with strict control of chemical composition and mechanical properties. Each heat is tested to ensure tensile strength, yield strength, and elongation meet the required values. The pipe undergoes visual inspection and dimension verification at every stage, guaranteeing compliance with tolerance standards. Our factory in Liaocheng, Shandong, has 51-100 skilled employees and operates an annual export value between US$50 million and US$100 million, which demonstrates a stable production capacity and a strong supply chain.
The seamless pipe is especially recommended for chemical transfer lines because its uniform wall thickness provides consistent pressure resistance. The 6-meter standard length helps reduce the number of weld joints, thereby lowering the probability of leakage at connection points. In addition, the dual certified 304L grade provides improved resistance to intergranular corrosion, which is a common concern when stainless steel components are exposed to sensitizing temperatures during welding.
For customers who require specific dimensions, we offer customization services. Outer diameter, wall thickness, and length can be adjusted according to your engineering drawings or project specifications. Surface treatments such as pickling, passivation, or sandblasting are also available. Whether your project involves high-purity chemical processing or general industrial piping, we can supply a suitable solution.
We also pay close attention to packaging and logistics. After passing final inspection, the pipes are bundled with protective caps, wrapped in water-resistant materials, and loaded into containers at Qingdao Port. These measures ensure that the products arrive at your site in excellent condition, ready for installation. Our export experience covers North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, Eastern Asia, Western Europe, Central America, Northern Europe, Southern Europe, South Asia, and the domestic Chinese market.
Trust Hemaokang Steel for your critical piping needs. Our ISO9001-certified quality management system, combined with the expertise of our 51-100 member team and annual export scale of US$50-100 million, ensures that every order is handled with professional care. We are committed to offering ASTM A312 304/304L stainless steel seamless pipes that meet your performance, budget, and delivery requirements.
Frequently Asked Questions
Q1: What is the difference between 304 and 304L stainless steel?
304 is the standard grade while 304L has a lower carbon content (maximum 0.03%). The lower carbon reduces the risk of carbide precipitation during welding, which improves corrosion resistance in the heat-affected zone. Our pipe is dual certified, so it meets both specifications.
Q2: Is this pipe suitable for high-temperature chemical service?
ASTM A312 pipes are widely used in elevated temperature services. The 304/304L grades can operate continuously at temperatures up to 870°C in air, but the allowable stress and temperature range depend on the specific design code and media. Please consult with our engineers for your exact service conditions.
Q3: Can the pipe be supplied in other lengths besides 6 meters?
Yes, we can supply custom lengths based on your requirements. Standard lengths are 6 meters, but other lengths such as 20 feet or random lengths are available upon request.
Q4: What does welded finish mean for a seamless pipe?
In this context, welded finish refers to the end preparation applied to the pipe, which is beveled and cleaned to facilitate smooth welded connections in the field. The pipe body itself is seamless. We can also provide plain ends or threaded ends if required.
Q5: Do you provide material test certificates?
Yes, material test certificates and supporting mill test reports are provided with each shipment. Dimensional inspection reports and hydrostatic test reports can also be furnished upon request.
Q6: How are the pipes packed for ocean shipment?
Pipes are bundled with steel straps, protected with plastic end caps, and wrapped in waterproof materials. They are then loaded into 40-foot containers or flat racks at Qingdao Port, depending on the order quantity and pipe size.
Q7: Can I request third-party inspection?
Yes, third-party inspection by SGS, BV, TUV, or other independent agencies is available upon request. We will coordinate with the inspection company and provide necessary documents.
Q8: What is the typical lead time?
For standard sizes and small quantities, the lead time is usually 7-15 days after deposit. For large or customized orders, the exact lead time will be confirmed by our sales team.
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