EN10216-5 D4 T3 Seamless Stainless Steel Pipe 1.4301 1.4404

EN10216-5 D4 T3 Seamless Stainless Steel Pipe 1.4301 1.4404

What Makes MTSCO Your Trusted Partner?

MTSCO employs a unique “factory complex” business model to deeply integrate industry resources. Our core strategic factory—HUXIN Pipe, boasts 35 years of stainless steel seamless pipe manufacturing experience and holds ISO, PED, and AD2000 certifications. As HUXIN PIPE's sole international sales center, MTSCO directly oversees every stage from raw materials to finished products. We not only offer the cost advantages of a manufacturer but also possess professional international trade service capabilities. We deliver genuine “factory-direct” pricing and “zero-distance” after-sales support. Interested in our pricing and lead times? Contact us today for a quote!

Key Specs at a Glance

Manufacturing Process Flow

EN10216-5 standards impose stringent requirements on dimensional accuracy and microstructure for pipes. The production process typically commences with cold drawing or cold rolling of raw pipes, a critical step for achieving the high precision tolerances of D4/T3. Subsequently, the pipes undergo solution annealing heat treatment to eliminate work hardening and restore the material's optimal corrosion resistance. Finally, pickling and passivation ensure surface cleanliness and form a dense oxide protective layer. HUXIN PIPE is equipped with advanced cold rolling mills and a annealing furnace, enabling precise control over tube dimensional tolerances and metallographic structure to ensure full compliance with European standards.

How Does MTSCO Achieve “Zero-Defect” Quality?

To ensure every seamless pipe meets EN10216-5 standards, we implement rigorous “3 quality inspection processes”:

· Rigorous Raw Material Selection and Re-inspection: We exclusively source raw materials from major suppliers like Baosteel and TSINGSHAN. Upon arrival, all materials undergo secondary PMI test to guarantee 100% compliance with chemical composition specifications.

· Full Process Traceability: Production is managed using process cards throughout. Critical stages are monitored by experienced technicians with photographic documentation, ensuring complete traceability at every step.

· 100% Final Inspection Before Shipment: Each shipment undergoes eddy current testing (ET), hydrostatic pressure testing, and dimensional verification. We also accommodate on-site inspections by third-party agencies like SGS, TUV, and BV.

Where It Performs：Critical Application

Seamless pipes in grades 1.4301 and 1.4404 are widely used in pressure vessels, chemical pipelines, and fluid conveyance systems. High-precision pipes meeting D4/T3 tolerance grades are particularly suitable for automated instrument connections, heat exchangers, and hydraulic systems demanding exceptional sealing integrity. Their outstanding dimensional stability significantly reduces on-site installation and welding complexity. With consistent quality, our products have been successfully deployed in major international offshore projects like FPSO P80 and P83. Whether for deep-sea operations or chemical plant construction, MTSCO delivers solutions proven to withstand the most demanding conditions.

FAQ

Q1: What is the main difference between 1.4301 and 1.4404 in EN10216-5 pipes?

A1: 1.4301 (AISI 304) is the standard austenitic stainless steel for general corrosion resistance. 1.4404 (AISI 316L) contains molybdenum, offering superior resistance to pitting and chloride corrosion.

Q2: What does D4/T3 tolerance mean for seamless pipes?

A2: D4/T3 represents a very high precision tolerance class defined in EN ISO 1127. D4 is ±0.5% of OD, and T3 is ±10% of wall thickness. Our advanced cold rolling equipment allows us to consistently meet these strict D4/T3 tolerances for precision applications.

Q3:How do you ensure product quality fully matches the description?

A3: MTSCO implements end-to-end quality tracking from raw materials to finished products. We conduct PMI test, mechanical property testing, and ultrasonic/eddy current non-destructive testing. Customers are welcome to designate third-party inspection agencies such as SGS or TUV. We commit to delivering products with zero defects.