GSY89 Four-station Hydro Tester-Bucking Unit

Products Description

Equipment Video

Equipment Parameters

Specification	Value
Model	GSY89 (Four-station: 4 pipes per cycle)
Pipe Size	Ф21–89 mm (Deviation Accuracy ≤ ±1.0%), Length: 5.5-13m (Bending Curvature ≤ 2 mm per 1000 mm, Customizable for longer or shorter range)
Working Capacity	Capacity ≥ 480 pcs/h (Ф21, Pressure=20MPa, Holding Time=5s)
Max. Pressure	21MPa (3,045psi, Customizable); Axial bearing capacity: 40T
Application Scenarios	Hydrostatic pressure testing for seamless steel pipes, welded pipes (longitudinal welded pipes ERW, spiral welded pipes SSAW, etc.), stainless steel tubes, oil tubings and casings (API testing), titanium tubes, alloy steel pipes, aluminum tubes, copper pipes, etc.
Operation Mode	Auto / Manual / Debugging & Maintenance
Pipe End Condition	Plain End
Pipe Material	Stainless Steel / Duplex / SuperDuplex / Inconel Grades (Soft contact system, avoid contact with carbon steel materials)
Pressure Holding Time	5~10s (Adjustable)
Sealing Mode	Radial large-gap sealing; Polyurethane hydraulic ring + Bearing circular block; Long service time (Durability > 3000 times); Open seal heads: The fixture is equipped with a clamshell-style sealing head, which allows for easy and efficient replacement, improving operational efficiency
Testing Pressure Accuracy	Pressure Sensor Accuracy: 0.5%, Control Accuracy: ±2% (Max. Testing Pressure)
Pressure Fluctuation	Holding time 5s, fluctuations <100 psi Holding time 25s, fluctuations < 500 psi
Daily Working Time	≥ 20 hours per day
Ambient Condition	Temperature: 5~40℃, Humidity: 10%~100%
Electric Supply	Voltage AC 380V±10%, Frequency 50HZ±1, Max. Installation Power: 160 kVA
Industrial Filtered Water	Suspended Solids ≤ 100mg/L, Hardness ≤ 10.6Dh, Pressure ≥ 0.3MPa
Clean Circulating Water	Pressure 0.20~0.50MPa
Compressed Air	0.4~0.6 MPa, < 6 m³/min
Emulsion	120 m³ for one time
Hydraulic Oil	HLP46 antiwear hydraulic oil (1200L required for one installation)
Total Weight	55T (Customizable)

Note: The conversion for 21 MPa to psi is approximately 3,045 psi.

I. Structures and Features

1. Overview

The GSY89 Four-Station Hydrostatic Tester is used to perform hydrostatic pressure tests on steel pipes to detect defects. The machine seals both ends of the pipe using a radial large-gap sealing method, fills it with high-pressure water, and holds the pressure for a specified time to check for leaks. Test results are saved in a database for traceability.

The process begins with the pipe entering the feeding rack, where it is moved to the alignment station and aligned with a fixed-end stopper. After a swirling water flush, the pipe is transferred to the test station. The test head moves to seal the pipe ends, and the pre-sealing booster starts sealing. After low-pressure water injection and venting, the main booster pressurizes the pipe. Pressure is held, and the test data is automatically recorded in the database.

After pressure holding, the system checks if the pipe passes the test. Unloading valves are opened to release pressure, and the pipe is flipped out of the tester. Failed products are sent to the waste bin, while qualified products proceed to the next process, completing one test cycle.

2. Process Workflow

Feeding Pipe → Pipe Flipping → Alignment, Swirling Flush Pipe → Hydrostatic Tester Feeding → Water Injection Test Head Positioning → Fixture Clamping → Pre-Sealing → Water Injection and Exhausting→ Pipe Pressurization → Pressure Holding → Pressure Release → Pipe Discharge from Hydrostatic Tester (Signal for Failed Products) → Air Blow for Water Evacuation → Discharge to Output Rack (Failed Products Directly to Waste Bin) → Next Cycle