Zhejiang Chuxin Fluid Control Co., Ltd.

24/08/2026

Do you still measure bolt‑hole spacing manually on fl**ges?
For fl**ge machining, inspection and site installation, chord‑length calculation is a basic but critical skill.
This formula helps you quickly calculate the true distance between two adjacent bolt holes from the PCD and hole quantity, avoid measuring errors on‑site.
Example shown: 2" Class300 fl**ge, 8 bolt holes, PCD 127 mm → chord length = 48.6 mm

18/08/2026

The export wooden boxes undergo two processes: HT heat treatment and MB fumigation. We prefer to use HT heat treatment packaging with IPPC identification, as it is more compliant, reliable and suitable for overseas transportation.

18/08/2026

From left to right, the device on the left is a metallographic microscope used to observe the microscopic metallographic structure of the material. The middle one is a Brinell/Rockwell hardness tester, which is used to measure the hardness of the material and ensure that the heat treatment is up to standard. The red net in the middle encloses the impact testing machine, which is used to conduct the Jasion-V type notch impact test to detect the low-temperature impact toughness. The small alley on the right is a metallographic sample drying machine.The white cabinet-like object on the right is a microcomputer-controlled universal material testing machine. It is used for tensile tests, measuring yield strength, tensile strength, and elongation after fracture.

18/08/2026

On the right, the white device is a Shimadzu PDA-5500V optical emission spectrometer used for detecting the chemical composition of metal materials, measuring elements such as C, Si, Mn, P, S, Cr, Ni, and Mo. In the middle, the black machine is a 3D printer. On the left table, the small device is a metallographic sample embedding machine, used for examining microstructures, grain size, and decarburization layers.

18/08/2026

Ultrasonic testing is used to detect fine cracks in pipe fl**ges.

18/08/2026

These are CSK-IA and CSK-IIA-T (CSK-IIA series), which are calibration blocks for instrument and probe performance, used to measure the probe's incident point, K-value, front edge, instrument linearity, and resolution.

17/08/2026

10/08/2026

Chuxin Fl**ge & Pipe Fittings Co., Ltd., formerly known as Yongxing Precision Pipe Fittings Factory, was founded in 1994. Through two decades of overcoming difficulties and forging ahead, the company has achieved leapfrog development. Starting as a simple bamboo shed workshop, it has now grown into a corporate group with multiple wholly-owned, self-operated, and joint-stock subsidiaries, writing a glorious chapter in the field of fl**ge and pipe fitting manufacturing.