Mengetahui Arti SDR dan PN pada Pipa HDPE

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Mengetahui Arti SDR dan PN pada Pipa HDPE

SDR berkaitan erat dengan angka PN (Pressure Nominal). Angka PN inilah yang dijadikan acuan para kontraktor proyek untuk menentukan penggunaan pipa pada jalur distribusi fluida/gas bertekanan.

Cara menghitung PN ini sedikit rumit, yaitu 20 dikalikan dengan kekuatan minimal pipa setelah 50 tahun pemakaian normal (air 20 derajat Celsius). Kemudian hasil pengalian tersebut dibagi dengan SDR-1 yang dikalikan dengan safety factor. Berikut jika dituliskan Rumus penghitungan PN

Apa itu SDR dan PN pada Pipa? https://www.hargapipaair.com

Perhitungan PN ini menggunakan banyak parameter yang tetap maka seringkali angka PN ini langsung dikategorikan sesuai dengan angka SDR nya. Misalnya saja pipa SDR 11 maka termasuk ke dalam golongan PN16. Pipa SDR 17 masuk ke dalam golongan PN 10 dan sebagainya.

Pada setiap penggunaan Pipa HDPE di proyek pembangunan, penting sekali mengetahui SDR (Standard Dimention Ratio) pipa yang akan digunakan. SDR adalah rasio perbandingan antara ketebalan pipa dan diameter luar pipa (OD/Outer Diameter).

Angka yang mengikuti kode “PN” mempunyai arti tekanan yang dapat ditahan oleh pipa HDPE tersebut. Sebagai contoh, PN10 berarti mempunyai ketahan terhadap tekanan sebesar 10×100 kpa (1000 kpa = 10 Bar). PN12.5 mempunyai ketahanan terhadap tekanan sebesar 12.5×100 kpa (1250 kpa = 12.5 Bar). “SDR” (Standard Dimension Ratio) adalah kode untuk mengetahui ketebalan pipa HDPE. Dengan mengetahui “SDR” nya, kita bisa mengetahui ketebalan pipa HDPE tersebut.

SDR = Outer Diameter (OD) 
Ketebalan dinding pipa

Ketebalan dinding pipa = Outer Diameter (OD)
SDR

Pipa HDPE cukup umum dipakai di dalam sistem Dewatering. Pipa HDPE memang mempunyai tingkat fleksibilitas lebih baik walau pun tidak sekuat pipe besi (Steel Pipe). Namun banyak yang masih belum mengerti betul atau paham betul mengenai pipa HDPE tersebut. HDPE (High-Density Polyethylene) berbahan baku minyak bumi. HDPE banyak juga dipakai dalam produk-produk plastik, HDPE mempunyai densitas sekitar 0.93 -0.97 g/cm3.

Tekanan pada pipa sering menjadi dasar dalam instalasi pipa, khususnya dengan pipa HDPE. Hal ini karena tanpa kejelasan tekanan yang pasti dan tepat, sistem penyaluran pada pipa tentu tidak akan berjalan sesuai yang diharapkan. Pipa bisa menjadi tidak tahan tahan lama, mudah rusak, dan air tidak mengalir pada kran yang dimaksudkan karena terbuang terlebih dahulu ke keran yang lain.

Daftar Harga Pipa HDPE https://www.hargapipaair.com

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