{"id":13491,"date":"2026-08-07T17:05:51","date_gmt":"2026-08-07T14:05:51","guid":{"rendered":"https:\/\/localhost\/wordpress\/?post_type=product&p=13491"},"modified":"2026-09-08T18:19:17","modified_gmt":"2026-09-08T15:19:17","slug":"igne-deligi-deney-aparati-kopya","status":"publish","type":"product","link":"https:\/\/www.liyatest.com.tr\/en\/urun\/igne-deligi-deney-aparati-kopya\/","title":{"rendered":"Pinhole Test Apparatus"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text css=”” woodmart_inline=”no” text_larger=”no”]<\/p>\n

What Is a Pinhole Test Apparatus?<\/h2>\n

The Pinhole Test Apparatus<\/strong> is used to identify the dispersive characteristics and erosion susceptibility of clay soils under laboratory conditions.<\/p>\n

Dispersive clay soils can erode internally when exposed to flowing water. This behaviour can create serious problems in earth structures such as embankments, earth dams, channels and other compacted-soil constructions.<\/p>\n

The pinhole test reproduces this mechanism on a laboratory scale by passing water through a small artificial channel formed inside a compacted clay specimen.<\/p>\n

ASTM D4647\/D4647M describes the method as a direct qualitative procedure for identifying and classifying the dispersive characteristics and resulting colloidal erodibility of clay soils.<\/p>\n

How Does the Pinhole Test Work?<\/h2>\n

The prepared clay specimen is compacted inside the cylindrical test cell. A small hole approximately 1 mm in diameter<\/strong> is then formed through the specimen.<\/p>\n

Water is passed through this opening under a controlled hydraulic head.<\/p>\n

During testing, the operator observes the condition of the discharged water and the behaviour of the hole inside the soil specimen. Increasing turbidity or enlargement of the pinhole can indicate dispersive behaviour.<\/p>\n

The current BS method also describes the pinhole test as passing distilled, deionized or demineralized water through a 1 mm diameter hole<\/strong> formed in recompacted clay.<\/p>\n

\u00d833 and \u00d844 mm Test Cell Options<\/h2>\n

Liya Test offers two main configurations.<\/p>\n

The LT-S0018<\/strong> uses a \u00d833 mm internal-diameter<\/strong> test cell, while the LT-S0019<\/strong> uses a \u00d844 mm internal-diameter<\/strong> cell.<\/p>\n

The transparent cylindrical body is positioned between an upper water-inlet head and a lower outlet head. This arrangement allows controlled water flow through the specimen and helps the operator observe the test process.<\/p>\n

Different plexiglass body diameters can also be manufactured on request.<\/p>\n

Sample Preparation and Water System<\/h2>\n

The test configuration includes the basic equipment required for specimen preparation and hydraulic connection.<\/p>\n

Liya Test lists PVC hose, 10 ml, 25 ml and 50 ml graduated glass cylinders<\/strong>, together with specimen-preparation equipment suitable for the selected body diameter.<\/p>\n

The 7 litre LT-S0500\/4 water tank must be ordered separately<\/strong> and is not included automatically with the standard apparatus.<\/p>\n

ASTM D4647 Pinhole Classification<\/h2>\n

The current ASTM D4647\/D4647M-13(2020)<\/strong> remains active.<\/p>\n

The standard provides three alternative procedures for evaluating dispersive soils. Depending on the selected method, results are assessed using factors such as effluent cloudiness, final pinhole size and water-flow behaviour.<\/p>\n

ASTM also emphasizes that the test provides a qualitative classification<\/strong>. Results should therefore not be interpreted as a direct numerical prediction of erosion rate in a full-scale dam, embankment or channel.<\/p>\n

BS 1377-2:2022 Pinhole Method<\/h2>\n

The old Liya Test page references BS 1377:5<\/strong>.<\/p>\n

However, BS 1377-5:1990 has been withdrawn<\/strong>, and the current consolidated laboratory standard is BS 1377-2:2022<\/strong>. The new standard specifically contains Clause 18 \u2013 Determination of dispersibility<\/strong> and Clause 18.1 \u2013 Pinhole method<\/strong>.<\/p>\n

Overall, the Pinhole Test Apparatus<\/strong> provides a practical laboratory method for identifying dispersive clay soils and evaluating their susceptibility to internal erosion under controlled water-flow conditions.<\/p>\n

[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

STANDART:\u00a0 <\/span><\/strong>BS 1377:5; ASTM D4647<\/span><\/em><\/p>\n

LT-S0018\u00a0 \u00a0 \u00a0 \u00a0 <\/strong>Pinhole Test Apparatus<\/em>| \u00d833mm<\/em><\/p>\n

LT-S0019\u00a0 \u00a0 \u00a0 \u00a0 <\/strong>Pinhole Test Apparatus <\/em>| \u00d844mm<\/em><\/p>\n

LT-S0500\/4\u00a0 \u00a0<\/strong>Constant Level Water Tank <\/em>| 7 Litre<\/em><\/p>\n","protected":false},"featured_media":11816,"template":"","meta":[],"product_brand":[],"product_cat":[161,164],"product_tag":[],"class_list":["post-13491","product","type-product","status-publish","has-post-thumbnail","product_cat-soil","product_cat-soil-permeability-dispersion","first","instock","shipping-taxable","product-type-grouped"],"yoast_head":"\nPinhole Test Apparatus | Dispersive Clay Testing | Liya Test<\/title>\n<meta name=\"description\" content=\"Pinhole Test Apparatus for identifying dispersive clay soils and evaluating erosion susceptibility under controlled water flow.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.liyatest.com.tr\/en\/urun\/igne-deligi-deney-aparati-kopya\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" 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