Steel Pipe Coupling Manufacturer

We are manufacturer of Socket Welding Coupling and supplies full coupling,half coupling in kinds of materials such as carbon steel, stainless steel, alloy steel.

Stainless steel pipe coupling is popular becasue of the corrosion resistance, long service life and strong connection. We supply socket weld pipe fittings in various stainless steel grades such as the commonly used grades SS304 and SS316.

Types of Socket Weld Coupling

Pipe coupling is a short piece of pipe that used to connect pipes together, socket weld coupling has socket weld ends.

Full Coupling: That means the two ends of pipe coupling are socket welding.

Half Coupling: One end of half coupling is socket weld and the other end is welding.

Straight Coupling: That means the diameter of the two ends are the same.

Reducing Coupling: The diameter of the two ends are different.

Stainless Steel Socket Weld Coupling Specification

Carbon Steel Half Coupling

ASTM A105, A350 LF2, LF3, A694 F52, F60, F65, F70

Alloy Steel Socket Weld Coupling

ASTM A182 F1, F5, F9, F11, F12, F22, F91

Stainless Steel Reducing Coupling

ASTM A182 F304/304L/304H, F316/316L, F310, F317, F321,F347

Duplex Stainless Steel Coupling

ASTM A182 F51, F53, F55, S31803, S32205, S32550, S32750, S32760

Socket Weld Coupling Dimensions

This chart can be used to design, manufacture and inspection.

Socket Weld Coupling Weight Chart

Zizi Engineering Co., Ltd is a leading industrial pipe fittings and flanges supplier for construction, petrochemical and oilfield customers.
We engaged in the manufacture and export of industrial pipe fittings for 9 years, our products have been sold to 37 countries around the world. We have a modern and professional manufacturing plant, established two warehouses near the harbor one after another. They are the base for our ability to offer high quality products and fast delivery.

Our products mainly are butt weld fittings, forged pipe fitings and forged steel flanges in stainless steel, carbon steel and alloy steel. They are produced according to ASME/ANSI American standards, DIN Germany Standards, JIS Japanese standards or as customer required. Those products are widely used in petrochemical industry, shipbuilding, oil field in ocean, electric power or city building.

Since we are founded, we are concentrated to be a professional global manufacture company with best products and service. Eventually we get some achievements after years of harding working and presistence. 

We will always insists on the managing objective of " quality first, service supreme, reasonable price". On the basis of continuously perfection the current products, our company persistently innovates upon the productive technology, provides vast customers with all kinds of superior new goods. We are willing to sincerely cooperate with friends from all walks of life to create a better future.