Pulangan ANSI B16.9/B16.28 weld punggung kelengkapan punggung weld

Butt weld are the most common type of steel fittings used for pipelines above 2 inci diameter. Ia digunakan untuk menukar laluan saluran paip (Siku), kurangkan / meningkatkan saiz alirannya (Pengurang), cawangan (T, menyeberang) atau tutupnya (Cap), dan disambungkan ke paip dengan mengimpal. Butt welding fittings are available in multiple shapes as elbows, T, Pengurang, Pangkah, etc and in a wide range of diameters (Dari 1/2 untuk 48 inci), Jadual (5/5S, 10/10S, 40/40S, 80/80S, XS/XH, XXS, 160, dan lain-lain) dan gred bahan (the most common are ASTM A234 WPB for carbon steel and ASTM A403 WP 304 untuk 316 for stainless steel wrought fittings). BW fittings are available in seamless and wekded execution (masing-masing < 24 / > 24 inci)

Carbon steel fittings are widely used for linepipes and piping systems in the oil & industri gas dan petrokimia, whereas stainless steel buttweld fittings find extensive application in processes subject to corrosion and erosion (and are also common within the pharmaceutical and food sectors). The material of the pipe shall generally match the material of the connecting butt welded fittings.

Untuk aplikasi tertentu, steel fittings are either coated on the outer surface or lined internally.

ANSI / ASME B16.9 – B16.28 This Standard covers overall dimensions, toleransi, penilaian, ujian, dan tanda-tanda untuk tempa karbon dan paduan baja kilang-dibuat buttwelding kelengkapan BOROUGH 1/2 melalui 48. Ia meliputi kelengkapan apa-apa producible ketebalan dinding. Standard ini tidak melindungi tekanan rendah tahan karat buttwelding kelengkapan. Lihat MSS SP-43, Tempa Karat Butt-Kimpalan Kelengkapan. Siku jejari pendek dan kembali, yang sebelum ini dimasukkan dalam ASME B16.28-1994, termasuk dalam piawaian ini. B16.9 hendaklah digunakan bersama dengan peralatan yang diterangkan dalam jilid lain siri piawaian ASME B16 serta dengan piawaian ASME yang lain, such as the Boiler and Pressure Vessel Code and the B31 Piping Codes”.

features OF WELDED FITTINGS
PAIP KIMPALAN / fittings connections:

are strong and leak-proof
minimize the pressure drops and the turbolence along the pipeline
mempunyai hayat perkhidmatan yang panjang
The allowable pressure ratings for fittings designed in accordance with the standard ASME B 16.9–1993 may be calculated as for straight seamless pipe in accordance with the rules established in the applicable section of the ASME B 31 codes for pressure piping. Hydrostatic testing of wrought fittings is not required. All fittings shall be capable of withstanding, without leakage, a test pressure equal to that prescribed in the specification for the pipe with which the fitting’s marking identifies.

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Buttweld ASME/ANSI B16.9 Pipe Fittings Available Types