Forged-Steel High-Pressure Hose End Caps for Hydrotesting

Product Overview

GT-TEST forged steel hydrotest end caps (Model GT-EC-A) are engineered for industrial clients and commercial procurement teams conducting hydrostatic pressure testing on thermoplastic pipe samples. These end closures seal both ends of a pipe specimen to generate controlled internal pressure during long-term pressure testing and short-term burst testing. Manufactured from stainless steel with carbon steel available as an option, the end caps accommodate pipe diameters from Ø12 mm to Ø2000 mm and support a maximum test pressure of up to 100 bar, depending on diameter and standard requirements. The split-clamp design enables automatic centering during installation, reducing setup time and minimizing the risk of misalignment under pressure. Each unit is supplied with a 1/4-inch male connection and a bleed valve for venting and drainage.

Key Design Features of Forged Steel Hose End Caps

Split-Clamp Automatic Centering System

The split-clamp mechanism allows operators to position the end cap onto the pipe end without precise manual alignment. Once the clamps are engaged, the closure self-centers on the pipe axis, ensuring an even seal around the full circumference. This feature is particularly relevant for large-diameter pipes where manual alignment would otherwise require multiple operators and extended setup time.

Hollow-Out Lightweight Construction

A hollow-out structural design reduces material mass while maintaining mechanical integrity. For reference, the single-end weight of a DN400 enclosure is less than 50 kg, and each clamp weighs 7.3 kg. This weight reduction allows two operators to handle and install large-diameter end caps without dedicated lifting equipment in most cases.

Integrated Air Inlet and Drain Port

Large-diameter end caps include an air resource inlet and a drain port. After a test cycle is completed, the drain port enables controlled water evacuation directly from the sample, reducing downtime between test runs. The bleed valve at the sample connection provides venting at the specimen itself, eliminating trapped air that could affect pressure readings.

Technical Specifications for Hydrotest End Closures

Applicable Standards for Pipe End Closures

ISO 1167

ISO 1167 specifies the method for determining the resistance of thermoplastic pipes to internal pressure under constant conditions. GT-EC-A end caps are designed to interface with test rigs operating under this standard, providing the sealed end connections required for both 20°C and elevated-temperature test configurations.

ASTM D 1598 and ASTM D 1599

ASTM D 1598 covers the time-to-failure of plastic pipe under constant internal pressure, while ASTM D 1599 addresses short-time hydraulic burst pressure. The end caps support both test types by maintaining a sealed pressure boundary throughout the test duration.

Industrial Applications of High-Pressure End Caps

These end closures serve pipe manufacturers, testing laboratories, and quality assurance departments that perform hydrostatic testing on PE, PPR, PVC, and PP pipes. Typical use cases include production-line quality control, third-party certification testing, and research-and-development material evaluation. The broad diameter range allows a single product line to cover small-diameter tubing samples and large-diameter production pipes, reducing the need for multiple end-cap inventories.

FAQ

What pipe diameters are compatible with GT-EC-A end caps?

The end caps fit pipe diameters from Ø12 mm to Ø2000 mm. Custom sizes outside this range can be discussed with the engineering team based on specific test requirements.

What is the maximum test pressure?

The maximum test pressure is up to 100 bar. Note that the achievable pressure varies with pipe diameter, wall thickness, and the applicable testing standard. The technical team will confirm the pressure rating for each diameter upon quotation.

What materials are used in the construction?

Standard construction is stainless steel. Carbon steel is available as an option for clients requiring a lower-cost material where corrosion resistance is not the primary concern.

How does the split-clamp centering system work?

The split clamps engage the pipe end and automatically center the closure on the pipe axis. This eliminates the need for manual alignment and helps ensure an even seal distribution around the circumference.

What information is needed to receive a quotation?

To receive an operative quotation, clients should provide the applicable testing standard, pipe material, maximum test pressure, and maximum pipe diameter. Quotations are typically issued within 24 hours of receiving complete specifications.