Additional inspection items of purchasing pneumatic valve is analysed how much you know

these days, many industry cannot leave the pneumatic ball valve, pneumatic ball valve is widely used in petroleum refining, long pipeline, chemical industry, paper making, pharmacy, water conservancy, electric power, municipal, iron and steel industry, etc. So for pneumatic ball valve to purchase additional inspection items you know how much, how much we know? These inspection items is not required, the user only when required by manufacturer. That is to say, users can according to different conditions of use, add some inspection items in order to better control the immanent quality of material. But raised these special requirement means that the rise in the price of the product, the cost of some inspection items such as X-ray detector is high. According to the using conditions and price of the product should be combined with comprehensive consideration. A-level pipeline pneumatic pneumatic valve, pneumatic valve bonnet steel, should be % radiographic testing, should comply with the ASME B detection range. Standards, including: steel casting defects in the solidification process and the key of the steel parts and the part of the stress concentration region, the bearing capacity is weak. Test result is not lower than ASTM E or ASTM E intermediate requirements. A-level pipeline pneumatic valve pneumatic valve, pneumatic valve cap compression forging steel should not be lower than JB or JB Ⅲ 3 forgings in the request. Butt end groove of pneumatic valve and the weld of a-level pipeline pneumatic valves shall be % X-ray detection.

, should understand the code and standard design and manufacturing:
API D the pipeline pneumatic valve
the API of the flange, threaded and welding connection metal ball pneumatic valve '
ASME B. The pneumatic valve of flanged, threaded and welding connection
ANSI/AWWA C 'inch to inch pneumatic ball valve'
BFCI - The pneumatic control valve pneumatic seat leakage
the MSS - SP General ball pneumatic valve with flange and butt welding,
BS of the petroleum, petrochemical and related industries with steel balls pneumatic valve '
BS' cryogenic pneumatic valve '
NACE MR' oil field equipment with sulfide stress cracking resistance of metal materials,
the GB/T the general pneumatic valve flange and butt welding of steel ball valve '
the GB/T' iron and copper ball pneumatic valve, '
JB/T' pipe pneumatic ball valve
'ISO' part of the rotary pneumatic valve actuator connection '
end connection size:
ASME B. The pipe flanges and flanged fittings
ASME B. The large diameter steel flange NPS to NPS
API 'large diameter carbon steel flange'
the MSS - SP The steel pipe flange
ISO - The metal flange in the first section steel flange
the GB/T to the steel pipe flange
the large diameter steel pipe flange of GB/T
HG to the steel pipe flange
SH 'petrochemical steel pipe flange'
JB/T to the pipeline flange
JIS B 'general principles of the steel pipe flanges'
ASME B. The butt welding end
ASME B. The forged socket welding and threaded pipe fittings '
BS' industrial the butt end of the pneumatic valve, pneumatic valve steel
BS of the pneumatic valve steel pneumatic valve socket end'