High-Middle-Low Pressure Union

High pressure union is forged and made of high strength alloy steel with imported world-class technology. Strict heat treatment ensures uniform metallographic structure and bearing capacity in the connector. The materials used fully comply with ASTM and AISI of USA, and the technical indicates of the product with API Spec 16C standard. The product is tight and reliable, and provides easy mounting and dismantling and good exchangeability. The connector of the product allows connection for pipeline thread, oil tube thread and butt weld or pressureless seal end.

The connecting surface of precise linear seal ensures reliable pressure sealing. Application is recommended for low-pressure manifold and operating pressure at maximum 1,000 psi.

Specification and reference dimensions of union

For figure 100, 1000PSI NSCWP, test pressure at 1500PSI with black nut and yellow parts

With compact construction, this union is widely used on low-pressure kill line and in application of air,water, oil or steam with medium pressure. Butt weld Sch.40 is desired for the applicable figure.

Specif ication and reference dimensions of union

For figure 200, 2000PSI NSCWP, test pressure at 3000PSI with blue nut and gray parts

O-shape rubber ring is mounted on the seal surface of the male connector for better sealing. Butt weld Sch.40 is desired for the applicable figure.

It is recommended for connection of manifold and pipes and for applications with negative pressure and corrosion.

Specification and reference dimensions of union

For figure 206, 2000PSI NSCWP, test pressure at 3000PSI with blue nut and gray parts

O-shape nitrile-butadiene rubber ring is mounted on the shutoff head of the union for effective sealing. The thread connector is exchangeable with those of Figures 200 and 206. Butt weld Sch.40 is desired for the applicable figure.

Specification and reference dimensions of union

The insulation design of the union connector removes the metal-to-metal contact in connection while the precisely fabricated wear-

resistant compound elastomer provides effective sealing. The replaceable O-shape seal assembly prolongs the service life of the union.

It is recommended for application or needs involving electrolytic corrosion.

Specification and reference dimensions of union

For f igure 211, 2000PSI NSCWP, test pressure at 3000PSI with gray nut and light blue parts

Precisely sealed bond surface ensures reliable pressure tightness.

It is recommended for application with oil, water, mud, gas or air.

Specification and reference dimensions of union

For figure 300, 3000PSI NSCWP, test pressure at 4500PSI with black nut and green parts

The design of thick wall and robust is used with ring-shape and tapered seal for easy centering and reliable sealing.

Specification and reference dimensions of union

For figure 400, 4000PSI NSCWP, test pressure at 6000PSI with black nut and red parts

Figure 402, black nuts and connecting parts are used.

Only the 2'' type is available-with nitrile-butadiene rubber seal ring.

Main seal is provided by the bronze holder.

It is recommended for use in the steam system and in the connection of manifold and pipe for production,drilling and well repair.

Specification and reference dimensions of union

For figure 600, 6000PSI NSCWP, test pressure at 9000PSI with black nut and silvery parts

With resilient nitrile-butadiene rubber seal ring, this figure is used for sealing and protecting the steel-to-steel match.

It is recommended for the connection of manifold and pipe and truck -mounted application and mud delivery. It may be used as pressureless seal union with butt weld Sch.80.

Specif ication and reference dimensions of union

For figure 602, 6000PSI NSCWP, test pressure at 9000PSI with black nut and orange parts

Resilient nitrile-butadiene rubber seal ring is mounted.

It is recommended for cement filling, fracturing, acidizing, testing and choke and kill line. It is designed for high-pressure systems including truck-mounted system. Also, it may be used as

pressureless seal union. Butt weld Sch. 160 or XXH is desired.

Specif ication and reference dimensions of union

For figure 1002, 10000PSI NSCWP, test pressure at 15000PSI with red nut and blue parts

Figure # 1002 union may also be used in applications with H2S and other acid gases.

With an spheric seat, the union allows a deviation by 7-1/2°from the center or angle adjustment with a total deviation capacity of 15°. In addition to the steel-to-steel match, the nitrile-butadience rubber O-ring ensures air-tightness in connection at any deflected position.

It is recommended for the connection of high-pressure lines when alignment is impossible.

The product may be used in applications with air, water, oil, mud or gas.

Specification and reference dimensions of union

For figure1003, 10000PSI NSCWP（7500 PSI NSCWP, 4in, 5in）with black nut and green parts

With replaceable resilient nitrile-butadiene rubber seal ring and robust wall thickness design, this figure is used in high-pressure system.

It is recommended for cement filling, fracturing, acidizing, testing and choke and kill line. Also, it may be used in pressureless seal connection. Butt weld Sch. XXH is desired.

Specification and reference dimensions of union

For figure 1502, 1500PSI NSCWP, test pressure at 22500PSI with blue nut and red parts

For this union, only the 2in type is available with a replaceable resilient nitrile-butadiene rubber seal ring combined in the stainless steel liner tube, providing complete compression protection in application with extra high pressure. The design of detachable nut/segment ring/retainer ring simplifies the removal of the nut from the piping.

For figure 2002, 20000 PSI NSCWP, test pressure at 30000PSI with red nut and parts 

With fluoroelastomer seal ring, 15000PSI NSCWP and the heat-treated parts 100% subjected to hardness test, this model complies with National Association of Corrosion Engineers Standard MR-01-75 and American Petroleum Institute RP-14E.

This product is designated for application with acid gases. Green nuts and parts.

Note: DIC = ductile iron casting SC = steel casting SF = steel forging AS = alloy steel