close
Choose Your Site
Global
Social Media
| Quantity: | |
|---|---|
FM/UL Listed Shouldered Couplings are engineered specifically for high-pressure piping systems utilizing shouldered-end steel pipes. As a key product from MaitoLead Pipeline Technology (Tianjin) Co., Ltd., a leading Chinese manufacturer, these couplings are designed to meet rigorous industry standards, ensuring consistent performance in demanding environments.
Constructed from ductile iron—conforming to material standards such as ASTM A536, GRADE 65-45-12, and QT450-10—they offer exceptional durability and resistance to wear. Equipped with high-quality gaskets (EPDM, NBR, or other materials), these couplings provide leak-free connections, making them suitable for long-term use in critical applications.
Their design prioritizes ease of installation and removal, facilitating quick assembly, efficient system maintenance, and adaptability to evolving project needs.
Material: Ductile iron (ASTM A536, GRADE 65-45-12, QT450-10)
Threads: Compliant with international standards including ASME B1.20.1, ISO 7-1, BS21, BSPT, NPT, and GB 7306
Size Standards: ISO6182, AWWA C606
Available Sizes: 1"-24"
Surface Treatment: Options include electrophoretic painting, electroplating, epoxy coating, and hot-dip galvanizing.
To ensure reliability under high-pressure conditions, the couplings undergo stringent pressure testing as follows:
NO. | Size Range | Pressure Requirement | Holding Time | Test Type |
1 | ≤DN50 | ≥0.5MPa | ≥5s | Air pressure |
2 | >DN50~DN350 | ≥0.5MPa | ≥10s | Air pressure |
3 | >DN350 | 1.5× rated working pressure | 5min | Water pressure |
The choice of gasket material depends on the application medium and environmental conditions. Below are the available options with their specifications:
Gasket Type | Recommended Application Medium | Related Standards | Temperature Range (℃/℉) |
E (EPDM) | Water supply, drainage, sewage, ambient air, weak acids/alkalis | GB5135.11, GB/T 21873 | -30~+130℃ / -22~+266℉ |
D (Nitrile) | Petroleum, vegetable oil, mineral oil | GB5135.11, GB/T 23658 | -20~+80℃ / -4~+176℉ |
S (SIUCON) | Drinking water, high-temperature dry air, high-temperature chemicals | GB/T 28604, GB5135.11 | -40~+180℃ / -40~+356℉ |
F (Fluorine) | Acid/alkaline solutions, hot lubricating oil | HG/T 2181 | -20~+180℃ / -4~+356℉ |
V (Neoprene) | Seawater | - | -20~+100℃ / -4~+212℉ |
FM/UL Listed Shouldered Couplings are versatile for use in various high-pressure environments, including:
Mining operations: Withstand harsh conditions and high pressure in mineral extraction systems.
Tunneling projects: Ensure leak-free connections in underground piping networks.
Water infrastructure: Suitable for water treatment plants, distribution systems, and sewage networks.
Industrial facilities: Adapt to heavy-duty piping in manufacturing and processing plants.
For comprehensive piping solutions, explore these complementary products:
HDPE Transition Coupling: Connects HDPE pipes to steel, PVC, or copper pipes securely.
Quick Rigid Coupling: Designed for fast assembly in rigid piping systems.
Angle Pad Coupling: Ideal for angular pipe connections in constrained spaces.
Flexible Coupling: Offers flexibility for systems with minor alignment variations.
Reducing Flexible Coupling: Suitable for fire protection systems requiring size transitions.
Compliance: Meets FM/UL standards, ensuring adherence to global safety and performance criteria.
Durability: Ductile iron construction and high-quality gaskets ensure long service life.
Versatility: Compatible with multiple pipe materials and suitable for diverse industries.
Ease of Maintenance: Simple installation and removal simplify system upgrades or repairs.
