Stamping four-way connector is a type of pipeline four-way connector formed through stamping technology, used to achieve fluid diversion or convergence in four directions. It has the advantages of high structural strength, good sealing, and easy installation, and is widely used in building water supply and drainage, HVAC, fire protection systems, and industrial pipe networks.

1、 Product Features

One time stamping forming, no weld seam: using hydraulic bulging or hot pressing technology, the metal streamline is continuous, avoiding weak points in the weld seam, significantly improving the compressive and fatigue resistance performance.

High dimensional accuracy: The mold molding ensures that the outer diameter, end face parallelism, and center distance tolerance are controlled within ± 0.5mm, making it convenient for on-site butt welding connections.

Fluid distribution equilibrium: The cross symmetric structure (positive four-way) allows fluid to be evenly distributed to the remaining three ends after entering from any port, reducing local velocity differences and lowering system pressure drop.

There are various connection methods available: supporting butt welding, socket welding, threaded connection, and double compression connection, suitable for different pipe materials and construction scenarios.

High system integration: Compared to using multiple three-way combinations, a single four-way connector can reduce the number of connection points, lower the risk of leakage, and reduce installation time.

Material diversity and adaptability support customization of various materials, including carbon steel (Q235, 20 #), alloy steel, austenitic stainless steel, duplex steel, titanium alloy, Hastelloy, Monel, Inconel, and special metal customization.

Stainless steel stamped fittings have excellent corrosion resistance and are widely used in industries such as chemical, food, and pharmaceutical; Carbon steel pipe fittings are economical and practical, and are the preferred choice for municipal engineering and ordinary industrial pipelines; Alloy steel pipe fittings can meet the requirements of special working conditions such as high temperature and high pressure.

2、 Execution standards

national standard:

GB/T 12459-2017 "Steel butt welded seamless fittings"

GB/T 19228.2-2016 "Stainless steel compression fittings - Part 2: Connecting fittings" (applicable to double compression structures)

Industry standards:

SH/T 3408-2021 "Steel butt welded fittings for petrochemical industry"

HG/T 2136-2022 "Glass lined three-way and four-way"

International standards:

ASME B16.9 (American standard butt welded pipe fittings)

DIN 2617 (German standard four-way)

ISO 3419 (International General Specification for Welded Pipe Parts)

All products must undergo radiographic testing (RT), ultrasonic testing (UT), and 1.5 times the working pressure water pressure test to ensure safety and reliability.

3、 Size specifications

注：A系列为ASME外径（如60.3mm），B系列为国标/欧标外径（如57mm）；H = L/2，适用于十字对称结构。

异径四通可通过“DN主管×支管”方式标注，如DN100×80，实现变径连接。

四、压力等级

‌公称压力范围‌：PN1.0MPa ~ PN420MPa（Sch5s ~ XXS）

‌常见等级对应‌：

‌Sch40‌：适用于PN1.6~2.5MPa，常规建筑与暖通系统

‌Sch80/XS‌：适用于PN4.0~10.0MPa，高压蒸汽、石油管线

‌XXS‌：适用于PN10.0MPa以上或强腐蚀环境，如核电、深海管道

‌耐温范围‌：

碳钢：-20℃ ~ +400℃

不锈钢：-40℃ ~ +600℃

合金钢：可达+650℃（如15CrMo）

实际选型应结合设计压力、温度、介质特性，依据‌ASME B31.3‌或‌GB 50316‌进行强度校核，确保系统长期稳定运行。