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{"title":"End Closure For Plastic Pipes Manufactured From Durable Stainless Steel Or","imgUrl":"https:\/\/img.chinax.com\/nimg\/69\/a3\/01778308290a336ccf8629462b20-200x200-1\/end_closure_for_plastic_pipes_manufactured_from_durable_stainless_steel_or.jpg","attrs":{"Sealing ring":"O-ring","Material":"304# Stainless steel or carbon steel","Technics":"Precision Casting","Model":"DN 400mm"}}
{"title":"Versatile End Closure For Plastic Pipes Compatible With Various Hydrostatic","imgUrl":"https:\/\/img.chinax.com\/nimg\/94\/4d\/a9cef5ff46575c850e0bc1b60b29-200x200-1\/versatile_end_closure_for_plastic_pipes_compatible_with_various_hydrostatic_pressure_and_bursting_testing_standards.jpg","attrs":{"Color":"Silvery white","Fixture structure":"Half round pot form, easy for installation, no leakage, convenient operation.","Max. Pressure":"4MPA","Weight":"280KG"}}
{"title":"ISO9001 Certified End Closure For Plastic Pipes Durable PVC Pipe End Caps for","imgUrl":"https:\/\/img.chinax.com\/nimg\/18\/d4\/82e3df678b787129cdc1e909394e-200x200-1\/iso9001_certified_end_closure_for_plastic_pipes_durable_pvc_pipe_end_caps_for_sealing_and_testing_applications.jpg","attrs":{"Working principle":"Sealing the testing pipes with high temperature resistant silicone seal rings embedded in the stainless steel or carbon steel closures seal groove, the closures metal rings press the silicone seal rings.","Application":"Sealing PVC, PE, PP-R, ABS, composite pipe samples for hydrostatic test, bursting test, negative pressure test, etc.","Color":"Silvery white","Sealing Ring":"O-ring"}}
{"title":"High Pressure End Closure For Plastic Pipes DN 20mm PP-R Plastic Pipe End Caps","imgUrl":"https:\/\/img.chinax.com\/nimg\/13\/15\/b2b18c791f74c2d95dac973e087b-200x200-1\/high_pressure_end_closure_for_plastic_pipes_dn_20mm_pp_r_plastic_pipe_end_caps.jpg","attrs":{"Type":"A","Material":"304# Stainless Steel","Exterior Size(mm*mm)":"\u03c660*60mm","Technics":"Precision Casting"}}
{"title":"Secure End Closure For Plastic Pipes Designed For DN 630mm PE Pipe Pressure","imgUrl":"https:\/\/img.chinax.com\/nimg\/d2\/54\/e9748816e52f8ae03d3531a0167e-200x200-1\/secure_end_closure_for_plastic_pipes_designed_for_dn_630mm_pe_pipe_pressure_testing_and_sealing_compliant_with_astm_d_1599.jpg","attrs":{"Color":"Silvery white","Brand Name":"TH","Model Number":"DN 630","Certification":"ISO9001"}}
{"title":"End Closure For Plastic Pipes DN 710mm PE PVC Pipe End Caps Suitable For","imgUrl":"https:\/\/img.chinax.com\/nimg\/8e\/e4\/7754d22e242e44e52b7ca5d9ef40-200x200-1\/end_closure_for_plastic_pipes_dn_710mm_pe_pvc_pipe_end_caps_suitable_for_hydrostatic_test_meeting_astm_d_1598_and_d_1599_standards.jpg","attrs":{"Product Category":"Plastic Pipe End Caps","Standards":"GB\/T 6111, EN921, ISO1167, ASTM D 1598\/1599","Model":"DN 710mm","Color":"Silvery white"}}
{"title":"Hydrostatic Test Plug End Closure For Plastic Pipes Suitable For Large Diameter","imgUrl":"https:\/\/img.chinax.com\/nimg\/c7\/c9\/ad62cc57c4afb844313c631eef45-200x200-1\/hydrostatic_test_plug_end_closure_for_plastic_pipes_suitable_for_large_diameter_dn_800mm_pvc_pe_pipes_meeting_astm_d_1598.jpg","attrs":{"Product Category":"Plastic Pipe End Caps","Exterior Size(mm*mm)":"\u03c6960*500mm","Material":"304# Stainless Steel Or Carbon Steel","Standards":"GB\/T 6111, EN921, ISO1167, ASTM D 1598\/1599"}}
End Closure For Plastic Pipes Manufactured From Durable Stainless Steel Or Carbon Steel For Long Lasting Pressure Testing
Product Overview
These DN400mm sealing closures—fabricated from either stainless steel or carbon steel—are purpose-built for end-sealing of PVC and PE pipes during internal pressure testing procedures. High-temperature resistant silicone seal rings are pre-installed within precision-machined seal grooves to ensure reliable performance.
Working Principle
Integrated metal compression rings on the closures exert uniform compressive force on the silicone seal rings. Under applied pressure, the silicone O-rings undergo elastic deformation to fill the clearance between the closures and pipe ends, thereby forming a tight, leak-free seal that ensures the integrity of the pressure testing environment.
Structural Composition
This hydrostatic testing fixture comprises:
Semicircular base
O-shaped silicone rubber sealing ring
Pressure ring
Fastening clamp
Fastening bolts
Compression bolts
Vent valve
Each component is engineered to work in tandem, with the sealing ring ensuring leak-proof connections and the vent valve facilitating air release to guarantee the accuracy of pressure testing data.
Applications
These closures are specifically engineered to deliver secure end-sealing for pipe specimens including PVC, PE, PP-R, ABS, and composite pipes, supporting a comprehensive array of performance assessments such as hydrostatic pressure testing, burst testing, and negative pressure testing.
Fixture Structure
This component features a semicircular trough structure, which facilitates quick assembly, delivers leak-tight sealing performance, and enables highly user-friendly operation during testing. Custom diameter specifications can be tailored to meet specific customer requirements, with material options including 304 stainless steel or carbon steel to accommodate diverse application needs.
Q1: What is the required surface roughness of the fixture's sealing contact area, and how does it affect sealing performance?
The sealing contact surface of the fixture has a roughness of Ra 0.8-1.6 μm, which is precision-machined to ensure tight fit with pipe ends. This smooth surface finish prevents seal ring damage caused by burrs or unevenness, and eliminates micro-gaps that could lead to pressure leakage during high-pressure testing.
Q2: What is the adjustable range of clamping force for the hydrostatic fixture, and how is it controlled?
The fixture's clamping force can be adjusted within the range of 5-50 kN, and it is regulated by torque-controlled fastening bolts. A calibrated torque wrench is recommended for operation—this ensures that the clamping force matches the pipe wall thickness (ranging from 2 mm to 50 mm) without causing pipe end deformation, which is critical for maintaining test accuracy.
Q3: What types of test media are compatible with the hydrostatic fixture, and are there any material restrictions for different media?
The fixture is compatible with common test media including deionized water, glycerol-water mixture, and mineral oil. For water-based media, both 304 stainless steel and carbon steel fixtures are applicable; for oil-based or weakly corrosive media, only 304 stainless steel fixtures are recommended, as carbon steel fixtures may suffer from rusting after long-term contact with oil.
Q4: What is the repeat positioning accuracy of the fixture when switching between different pipe diameters, and how does it impact test results?
The fixture has a repeat positioning accuracy of ±0.2 mm when replacing adapter parts for different pipe diameters. This high precision ensures that the pipe axis remains aligned with the fixture's pressure inlet in each test, avoiding eccentric pressure loading that would otherwise cause biased burst pressure data.
Product Gallery
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Employee Number:
50~60
Ecer Certification:
Verified Supplier
Beijing Tonghe Testing Instruments Co., Ltd. Profile
1. Company Foundation and Positioning:
Beijing Tonghe Testing Instrument Co., Ltd. was founded by a core team with over 20 years of experience in material testing and testing machine R&D. With mature technical solutions and a global... Beijing Tonghe Testing Instruments Co., Ltd. Profile
1. Company Foundation and Positioning:
Beijing Tonghe Testing Instrument Co., Ltd. was founded by a core team with over 20 years of experience in material testing and testing machine R&D. With mature technical solutions and a global...