In fluid transportation and industrial pipeline systems, stainless steel pipe fittings are truly the "joints" and "links"—with their precise geometric shapes and reliable connection performance, they connect pipelines into a highly efficient network.

First, the three main connection methods for stainless steel pipe fittings:
(1) Stainless steel press-fit fittings: Sealing is achieved through compression using special tools. They are available in S-type (with an extended straight section at the socket) and D-type (without an extended straight section at the socket). Applicable to DN15-DN100, nominal pressure ≤PN25, used in systems for drinking water, direct drinking water, gas, and medical gases. Convenient construction and good seismic resistance.
(2) Stainless steel grooved fittings: Connected by clamps, with grooves at the ends. Applicable to DN65-DN350, nominal pressure ≤PN25, temperature ≤95℃, widely used in fire-fighting water supply and air conditioning circulating cooling water. 
(3) Stainless steel welded pipe fittings: including socket weld (DN15-DN300) and butt weld (DN15-DN800), with wall thicknesses ranging from SCH5S to XXS. They offer good sealing performance, low leakage risk, and are suitable for high temperature, high pressure, and harsh operating conditions.

Second, the five major product categories of stainless steel pipe fittings:
* Elbows: 90°/45°/180° elbows, short radius R=1D, long radius R=1.5D, divided into Type A (both ends socketed) and Type B (one end socketed, one end spigot)
* Tees/Crosses: Equal/reducing tees and crosses
* Reducers: Concentric/eccentric reducers
* Pipe Caps/Endcaps: Used for sealing the ends of pipes
* Adapters: Internal/external thread adapters, press-fit flanges, grooved flanges

Third, the four major material series of stainless steel pipe fittings:
* 304 General Purpose: Drinking water, food hygiene, general industrial
* 316/L Corrosion Resistant: Seawater, chemical, pharmaceutical, and other corrosive environments
* 321 High Temperature Resistant: High-temperature piping systems
Duplex Stainless Steel Series: Such as S31803, high strength, resistant to chloride stress corrosion, used in nuclear power and petrochemical industries.

Fourth, Full Range of Stainless Steel Pipe Fittings:
Press-fitting Fittings (DN15-DN100): Equal/reducing fittings, tees, elbows, caps, threaded adapters, flanges
Grooved Fittings (DN65-DN350): Clamps, tees, elbows, grooved flanges, reducers
Socket Welding Fittings (DN15-DN300): Equal/reducing fittings, tees, elbows, adapter flanges
Butt Welding Fittings (DN15-DN800): 90°/45°/180° elbows, equal/reducing tees, concentric/eccentric reducers, caps
Wall Thickness Series: SCH5S, SCH10S, SCH20S, SCH40S, SCH80S, XXS

Fifth, Professional Technical Support for Stainless Steel Pipe Fittings
· Selection Consultation: We recommend the optimal solution based on the medium, pressure, temperature, and installation environment.
• Standard Guarantee: Complies with GB/T 19228.1-2024, GB/T 12459, CJ/T 152-2016, ASME B16.9, and other standards.
• Performance Guarantee: All pipe fittings undergo water pressure and air-tightness tests to ensure long-term leak-free operation.