All welded ball pneumatic valve manufacturing standard and the acceptance standard is what?

full welding pneumatic ball valves are manufactured APID, API, GB, ISO standard such as research and development production, has the advantages of compact structure, elegant appearance, reliable quality. PTFE, RPTFE, Nylon were used respectively to do pneumatic valve seat seal, such as pneumatic valve adopts the WCB, WCC, LCB, WC material such as; Can be installed in CLASSLb ~ CLASSLb etc all kinds of piping, nominal diameter range/' ~ '; According to the different material, suitable temperature can be in - ℃ ~ ℃ range can safe use. All fixed pneumatic ball valve pneumatic seat support ring spring is installed inside the pneumatic ball valve with pneumatic valve seat seal, maintain a good seal between sex and timely compensation pneumatic ball valve with pneumatic seat sealing between the wear and the pneumatic ball valve with pneumatic seat sealing performance to achieve optimal, sufficient to achieve the effect of zero leakage.
pneumatic valve testing standard scope of application: this standard is applicable to the production of pneumatic valve test items and method, judge standard about records, etc.
a: material inspection
( ） Material inspection according to the regulations of the ONS M material management of each furnace must be managed manufacturing number form each other.
（ ） Test method for
( A chemical composition ONS K according to the material analysis, to bring the book
( Mechanical performance testing ONS K b according to the universal test shows that, to bring the book
( C impact test ONS K stamping brinell hardness test operation essentials book
( D rockwell hardness test ONS K operating essentials book
( ） Decision criteria
in accordance with JIS G stainless Steel Casting products, JIS G stainless Steel rods, STM A Austenitic Casting Steel Casting for Hingh - Temperature Service, AISI, other specifications.

appearance, appearance inspection check by visual inspection.
（ ） Casting products inside and outside surface can have harmful shrinkage cavity, burr, shell, slag inclusion and crack lack of scale.
（ ） Casting product cannot have harmful scars, height difference, depth strain
( ） Machined surface can't have harmful defects, different roughness, surface finish, instruction execution according to the drawing.
（ ） Pneumatic valve seat surface and the ball pad all there can be no shrinkage cavity, scar.
（ ） Flow hole to have a moderate degree of finish on both ends.
（ ） With ONS D pneumatic valve pneumatic valve body surface representation or production essentials book
3: the correct way of said the hydrostatic test acceptance of the project:
the water pressure strength test, shell: do not allow the pneumatic valve body water leakage and water penetration crack
and pneumatic hydraulic seating test: let the pneumatic valve is in a state of half-open, fixed pneumatic valve keep device, don't let the internal residual air, ensure the test pressure, holding time on the basis of using test with a hammer blow on average, use visual check pneumatic valve body crack, water leakage seepage etc.
, double block DBB discharge function, test
, pneumatic valve dib -- double partition and discharge ( Seal
4: two-way pneumatic sealing test include: airtight inspecting by 产购 manual regulation experiment.
and low pressure seal test
let pneumatic valve in half closed state, the fixed protection device, pneumatic valve for pressure to detect pressure on %, confirm leakage side, side add pressure to the rules, in the prescribed time confirm that pneumatic valve body gland sealing ring of leakage. Cannot have pneumatic valve, sealing ring, gland leakage. Performance testing and inspection has the following five:
) Torque test, switch pneumatic valve:
) And drive train strength test
) , anti-static test
) , on the test
) , total differential pressure switch time
5: other inspection:
appearance inspection, pneumatic valve
, weld NDT inspection.