Technical rmation
ZA.VE.RO. INDUSTRIAL VALVES 0 CONSTRUCTION STANDARDS API - American Petroleum Institute Spec. 6A Spec. 6D Spec. RP6F Spec. 6FA Std. 598 Std. 605 Std. 607 Specification for wellhead and christmas tree equipment. Specification fot pipeline valves. Recommended practice for fire testing of valves. Specification for firetesting of valves. Valve inspection and test. Large diameter carbon steel flanges. Fire test for soft seated quarter-turn valves. ANSI - American National Standard Institute ASME - American Society of Mechanical Engineers B6. Forged steel fitting socket-welding and threaded. B6.5 Steel pipe flanges and flanged fittings. B6.0 Face-to-face and end to end dimensions of ferrous valves. B6.25 Butt welding ends. B6.34 Steel valves - Flanged and butt welding ends. B6.47 Large diameter steel flanges (NPS 26 through NPS 60) B3.3 Chemical plant and petroleum refinery piping system. B3.4 Liquid petroleum transportation piping systems. B3.8 Gas transmission and distribution piping systems. ASTM - American Society for Testing Materials 0.0 Steel piping, tubing and fittings. 0.02 Ferrous casting; Ferro alloys. 02.0 Copper and Copper alloys. 02.04 Nichel and Nichel alloys. 03.0 Metals - Mechanical testing; Elevated & low temperature test; Metallography. 03.03 Nondestructive testing. ISO - International Organization for Standardization ISO 900 Quality systems - Model for quality assurance in design/development, production, installation and servicing. BRITISH STANDARD BS 560 BS 2080 BS 4504 BS 546 BS 535 BS 6755 Steel pipe flanges and flanged fittings. Face-to-face, centre-to-face, end-to-end, and centre-to-end dimension of flanged and butt-welding end steel valves for the petroleum, petrochemical and allied industries. Flanges and bolthings for pipes valves and fittings. Inspection and test of steel valves for the petroleum, petrochemical and allied industries. Steel ball valves for the petroleum, petrochemical and allied industries. Testing of valves. MSS - Manufactures Standardization Society SP 6 SP 25 SP 44 SP 55 SP 6 SP 72 Standard finishes for contact faces of pipe flanges and connecting - end flanges of valves and fittings. Standard marking system for valves fittings, flanges and unions. Steel pipeline flanges. Quality standard for steel castings - visual method. Hydrostatic testing of steel velves. Ball valves with flanged or butt - welding ends for general service. NACE - National Association of Corrosion Engineers MR-0-75 Sulfide stress cracking resistant metallic materials for oil field equipment. 50
0 2 ZA.VE.RO. INDUSTRIAL VALVES 2 MATERIAL CARBON STEEL STAINLESS STEEL CS LTCS AUSTENITIC SS MARTENSITIC SS DSS (DUPLEX) SPECIAL ALLOY OTHER MATERIALS of COSTRUCTION ASTM UNS OTHER DESIGNATION APPLICATIONS AISI 440 G4400 A694 F52 A694 F60 API 6A 60K A694 F65 A350 LF2 K030-46 C A350 LF3 K32025-0 C LOW TEMPERATURE A82 F304 S30400 A82 F36 S3600 A82 F36L S3603 SOUR SERVICE A82 F36Ti S3635 A82 F32 S3200 CRYO (-96 C) & LT A82 F347 S34700 HIGH TEMPERATURE A82 F44 (SUPERAUSTENITIC) S3254 6% Mo CLORIDE SERVICE A82 FX-M9 S2090 NITRONIC 50 A F6A S4000 AISI 40-3% Cr A82 F6NM S4500 AISI 45-70 C S7400 7-4 PH A82 F5 A82 F53 (SUPERDUPLEX) S3803 S32750 SAF 2205 SAF 2507 MARINE ENVIRONEMENT SUBSEA A82 F60 A82 F55 (SUPERDUPLEX) S32760 MARINE ENVIRONEMENT SUBSEA SOUR SERVICE HIGH PRESSURE B446 N06625 INCONEL 625 N08825 INCOLOY 825 H2S (>5%) VERY SOUR SERVICE B637 N0778 INCONEL 78 B64 N04400 MONEL 400 ALCHYLATION N05500 MONEL K500 ALCHYLATION N06022 HASTELLOY-C22 HYPOCLORITE SERVICE N0276 ALLOY C276 B348 TITANIUM B48 C95500 BRONZE B48 C95800 BRONZE B5 C70600 BRONZE B62 BRONZE 3BOLTING MATERIAL BODY MATERIAL STD BOLTING CS B7/2H B7M/2HM LTCS L7/4 L7M/7M SS B8/8 On request: A453 Gr.660, Monel K500 Treatment like HDG, Zinc Plating, PTFE coating can be done on request. OTHER AVAILABLE B8M/8M B8M/8M Cl.2 UNS S3803 DSS B7/2H HDG UNS S32750 UNS S32760 5
ZA.VE.RO. INDUSTRIAL VALVES 0 4 MATERIAL of SEAT AVAILABLE STANDARD DESIGNATION DESCRIPTION RPTFE filled with glass or carbongraphite DEVLON (NYLON) PEEK PCTFE VESPEL DELRIN SPECIAL APPLICATION Hi-Temp (up to 230 C) Hi-Pressure Cryogenic service Very Hi-Temp (above 300 C) 5MATERIAL of SEAL All valves have secondary graphite seal. On request or in case of special applications other kind of seals are also available (Garlock packing, lip-seal, PTFE ring, Chevron packing) STANDARD AVAILABLE DESIGNATION DESCRIPTION SPECIAL APPLICATION FKM 90 FKM 90 - AED Anti Explosive Decompression HNBR Methanol HNBR - AED Anti Explosive Decompression Methanol KALREZ (FFKM) Hi-Temp. (up to 327 C) ELAST-O-LION 0 (HNBR) Methanol ELAST-O-LION 985 (HNBR) Low Temp. (up to -46 C) GLT ENDURA 52
0 ZA.VE.RO. INDUSTRIAL VALVES 6ENDS SHAPE TYPE DESCRIPTION APPLICATION THREADED WELDED (WE) CLAMP FLANGED RF RJ HUB BW PE SW NPT (M) NPT (F) Raised Face Sealing on RF flanges is by flat non-metallic gaskets fitted within the bolts of the flanges. Surface finish is controlled depending on the type of gaskets being used. Ring Joint Ring type metal gaskets must be used on this type of flange facing. This coupling requires bolting, clamps and seal ring. As different designs are produced by different manufacturers we always require to the customer to supply the HUB machining drawing. Butt Welding This construction offers the highest verifiable integrity of welding as BW connections are easy to radiograph. Different schedules can be supplied. Plain Ends This kind of welding end match to the SW end. Socket Welding This kind of welding end match to the PE end. Threaded joints as per American National Taper Pipe Thread. Typically used for low pressure (class 50-300-600) Typically used for high pressure (class 900-500- 2500-API 6A) Typically used for high pressure (class 900-500- 2500-API 6A) BW ends are generally used when the possibility of fluid leakage must be eliminated. Typically used for applications where no extremely hazardous fluids neither fluids with tendency for crevice corrosion are present. Typically used on commodity valves. Others available: BSP (ISO 228/ e ISO 7/), FLAT FACE, LARGE FEMALE, LARGE GROOVE, COMPACT FLANGE, SAE. 53
ZA.VE.RO. INDUSTRIAL VALVES 0 7 LOCKING DEVICE OPEN POSITION CLOSE POSITION Locking facilities are available for all our valves, both gear and lever operated. Locking device, to use both in open and in close position is suitable to receive padlock. 8FIRE SAFE Designed in accordance with API 607 FLOATING TYPE TRUNNION TYPE When non-metal parts are destroyed in a fire, the upstream medium pressure push the ball into the downstream metal seat lip and the stem to the body preventing leakage due to a secondary metal-to-metal seals. For all static seals and on the stem for trunnion execution the fire safe is provided by a secondary graphite sealing. 9ANTI STATIC DEVICE FLOATING TYPE TRUNNION TYPE Anti static gasket grants conductivity between body and stem. Anti static ball with spring grants conductivity between body and stem. Antistatic device between ball and stem is a direct metal contact. On request, ball with spring option can also be done between ball and stem both for floating and for trunnion valves. 54
0 ZA.VE.RO. INDUSTRIAL VALVES DESIGN 0SEAT Soft seat Metal seat Soft seated valves are provided with a metal seat ring which is sealing against the ball by means of a resilient insert and against the body by a seat gasket. Metal seated valves are recommended for abrasive service and for the higher operating temperatures. Ball and seat rings contact surfaces are with tungsten or chrome carbide coating. SINGLE PISTON EFFECT (SELF RELIEVING) uni-directional seat Ball valves can be supplied with both seats uni-directional, both seats bi-directional or a combination of the two. C A A B D E F C (A-C)>(B-C) DOUBLE PISTON EFFECT bi-directional seat (A-C)>(B-C) B D E (D-E)>(D-F) (D-E)<(D-F) F In the standard design each ring performs the Single Piston Effect. The pressure acting on the external side of the seat ring creates the Piston Effect, which results in a force pushing the seat against the ball. The pressure acting on the internal side of the seat rings pushes them equally away from the ball. Therefore the seats are Self Relieving, allowing any excess pressure acting in the body cavity to be discharged in the line as soon as the force caused by the pressure overcomes the one provided by the springs. On request, the seat ring design may be modified to perform the Double Piston Effect action. In this case the pressure acting on both the external and the internal side of the seat rings results in a force pushing them equally against the ball. Therefore each seat ring allows for the required tightness even if the pressure is applied in the body cavity. This feature adds an extra sealing to the valve but, to release the possible excess pressure developed in the body cavity, it is necessary to use an external safety relief valve. 55
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