The embassy's fire protection system conducted pressure testing on more than ten FM-certified grooved pipe fittings. Our national standard grooved pipe fittings passed all tests on the first attempt and operated perfectly under high pressure of 10 MPa.

Huai'an TV Station is located in Huai'an City, Jiangsu Province. The construction unit places great emphasis on product quality and the HT Casting national standard grooved pipe fittings, with their high standard of quality and strong track record, successfully won the bid and received praise from both the construction team and the project owner.

In 2012, maintenance work was carried out on over 30 fire and rainwater pipelines around Tiananmen Square. Our company's national standard grooved pipe fittings were designated for all of these pipelines.

The new National Library of China is a significant cultural construction project under the national "Fifteenth Five-Year Plan." The second phase of the project, undertaken by China Railway Construction Corporation, involved over three years of intensive construction. The library has stringent requirements for its fire protection system. After undergoing multiple reviews by the project team, the HT Casting national standard grooved pipe fittings passed all tests. Once installed, these grooved pipe fittings successfully passed the pressure test without any leaks or seepage, ensuring the smooth operation of the National Library.

The construction period is 3 years, and it was carried out by the winning bidder, China Railway 14th Bureau, using the mud-water shield construction method. The tunnel project poses great construction difficulties, with high costs for the fire protection system. Therefore, the selection of fire protection products is particularly strict. After expert evaluation and on-site testing, HT Casting national standard grooved pipe fittings, with a commitment to "100-year durability" and excellent product quality, have received unanimous praise from the expert group. These products have been used without causing any accidents.

Zhuhai Campus of Sun Yat-sen University is a key national project. The project owner implemented a "zero-accident brand selection" scheme for the fire protection system. After several inspections and certifications by an expert group, HT Casting national standard grooved pipe fittings were ultimately designated as the exclusive brand for the fire sprinkler system in Zhuhai Campus of Sun Yat-sen University.

The brand of the fire protection system was determined through a dual confirmation process that involved recommendations from the construction team and certification from a brand library. HT Casting national standard grooved pipe fittings were recommended multiple times and passed inspections by relevant departments, ultimately being designated for use in the project.

The project department of Baolong in Qingpu conducted extensive research on fire protection products, conducting comprehensive evaluations of product quality certification, engineering performance, and other aspects. In the end, HT Casting national standard grooved pipe fittings were awarded the bid based on our outstanding performance in over a dozen Wanda Plazas and a guarantee of zero accidents.

The first party of Tianyue Bay Garden specified the use of national standard products. After being approved by the expert group and certified by the first party, HT Casting national standard grooved pipe fittings were ultimately awarded the bid and used. After years of operation of the fire protection system, there have been zero accidents, ensuring the safety and well-being of the residents.

Qingdao Liuting International Airport was established in 1944. The first phase of expansion was completed in November 1987, followed by the completion of the second phase in 2004. In 2005, it was upgraded to an international airport, and the third phase of expansion was completed in 2007.
Initially, HT Casting national standard grooved pipe fittings were used for maintenance work at the old Liuting Airport. After being used by the construction team and inspected by the project owner, they received excellent evaluations for their quality, competitive pricing, good service, and adherence to national standards. As a result, our grooved pipe fittings were designated for use in the construction of the new airport.