we are the top manufacture of seamless stainless steel tubing according to astm a 213/269 standard for hydraulic and instrumental use tubing we have exported to singapore oil rigs for three years instead of tubing made in japan.and till now no any quality problems. The follows is our company&＃039;s introduction for your reference Shanghai Sundream Steel Tube Manufacture Co., ltd was founded in 1998, invested by Bao Steel. It is now belong to Double Gold Enterprise. With 10 years professional practice in seamless steel tube industry, We aim to provide our clients with high-qualified and cost-effective products in accordance with most international related standards. our mill has been well recognized and respected by its clients, industrial fellows and 3rd party inspection organizations for its excellence in both products and services. We offer a wide range of seamless tube products, 80% of them were exported to 52 countries and regions all over the world