![\"\"](\"https:\/\/www.unitedsts.com\/wp-content\/uploads\/2022\/12\/weldtit-flange-300x257.jpg\")
<\/p>\n
In general, we consider that a connection must have three main qualities for be successful:<\/p>\n
SEAL<\/strong> (must seal the connection between lined sections and seal the pipeline contents from the environment)<\/p>\n RETAIN<\/strong> (the connector must retain the liner in place so that the corrosion protection is not compromised)<\/p>\n ROBUST<\/strong> (the connector must create a robust connection between adjacent lined sections of steel pipeline, ideally as strong or stronger than the pipeline material itself)<\/p>\n<\/div>\n Tite Liner\u00ae system flange Connection<\/strong><\/p>\n Tite Liner\u00ae system flange fittings have been used since 1985 to provide a tight seal and restrained joint in pressures up to and over 5,000 psi. Each raised face steel flange is machined to match the inside diameter of the steel pipe and inspected to verify that the raised face dimension is correct. A radius that matches the radius of the polyethylene flange-fittings is manufactured by USTS to exact dimensions to ensure superior performance of the completed flange connection.<\/p>\n Each polyethylene flange-fitting is butt-fused to the end of the liner section and allowed to retract to fit tightly against the raised face of the steel flange. As two steel flanges are joined together, the polyethylene flange-fitting is compressed, creating a seal in the pipe system. A spacer ring is placed between the steel flanges to provide the correct amount of compression of the liner flange. This compression creates the seal, and the spacer ring adds long-term stability to the connection.<\/p>\n Tite Liner\u00ae system slurry flange <\/strong>\u2122Connection<\/strong><\/p>\n USTS has developed a patented, unique flange connection for use in slurry and non-slurry pipelines. Our steel flange and polyethylene flange-fittings are both machined with specially designed interlocking surfaces that provide uniform geometry across the joint.<\/p>\n The Slurry Flange\u2122 connection not only allows the use of the same sealing method proven with thousands of Tite Liner\u00ae system flange connections, but also eliminates excessive wear of the polyethylene pipe lining due to particle turbulence and provides smooth flow across the pipe joint. An optional secondary seal using a gasket can be provided to further protect the polyethylene pipe lining.<\/p>\n WeldTite\u00ae EF welded connection<\/strong><\/p>\n For projects where a flanged connection is either undesirable or prohibited, United Pipeline Systems offers a welded connection that can create a fully welded pressure vessel. United Pipeline’s WeldTite\u00ae EF welded connection is similar in function to the CRA product. All wetted materials are thermoplastic and the continuously smooth inside diameter of the connection makes it ideal for abrasive (slurry) applications.<\/p>\n<\/div>\n WeldTite\u00ae CRA welded Connection<\/strong><\/p>\n WeldTite<\/strong>\u00ae CWC welded Connection.<\/strong><\/p>\n The Compression Welded Connection has evolved from United\u2019s pursuit of the best flangeless connection for lined pipelines over the last 10 years. We have taken all the lessons learned over that time and applied them to our best design to date. We have taken steps to simplify the connection and to rely on time and industry tested methods.<\/p>\n The Compression Welded Connection is applicable to all current types of liner connections, TiteLiner, Rotolining, and bare steel connections.\u00a0 \u00a0The Compression Welded Connection is not size limited.<\/p>\n<\/div>\n![\"\"](\"https:\/\/www.unitedsts.com\/wp-content\/uploads\/2022\/12\/Wedite-EF-300x145.png\")
<\/p>\n![\"\"](\"https:\/\/www.unitedsts.com\/wp-content\/uploads\/2022\/12\/weldtitr-cra-300x145.png\")
\nThe USTS\u2019s CRA welded connection allows for the connection of two thermoplastic lined sections of steel pipe without the use of flanges. The connection creates an end seal on the thermoplastic liner which is tested to over 9,000 psi and materials are either thermoplastic or corrosion resistant alloy (CRA). Installation and operation comply with pipeline codes: ASME B31.3, ASME B31.4 and ASME B31.8. There are more than 200 of these connectors\u00a0are installed to date<\/p>\n<\/div>\n![\"\"](\"https:\/\/www.unitedsts.com\/wp-content\/uploads\/2022\/12\/gen31.jpg\")
<\/p>\n