technical description:

Transcription

1 The gate valves are used as the closing valves for: - noncorrosive fluids - saturated steam - oil - air - petroleum and petroleum products Operating parameters are in accordance with the standard ASME B Ambient temperature from -58ºF to +122ºF (-50ºC to +50 ºC). Application in other working conditions has to be discussed with the manufacturer. Dependence of pressure on temperature according to ASME B technical description: construction: The construction of steel gate valves of MSA corresponds to API 600 and BS Gate valves are yoke, flanged or welded with unnarrow flow rate and with flexible or fixed wedge. Bodies, covers and yokes are cast. Wedges could be forged or cast. All wedges are guided. Sealing seats are bolted or welded into the body. Overlays in seats depends on Trim. Valves have rising non-rotative spindle and bolted joint of body-cover. Standard spindle threads are ACME 2G-LH. Operation with a handwheel. On the basis of mutual agreement, the gate valves can be operated by angle transmission, electric actuator or pneumatic actuator. For easier control the gate valve with larger diameters are equipped with bearings. Sealing material is pressed rings from expanded graphite and graphited plaited rings. The properties of gate valve packing meet the requirements of the directive Clean Air Act, Amendment from The gate valves can be also equipped with: drainage, venting, relief from interspace and bypasses, on the special customer s request. designed dimensions: The dimensions of standard design are stated in the table below. material design: The gate valves are supplied in different material variants. assembly: The yoke gate valve can be assembled in any position into the pipeline. testing: The gate valves are subjected to presure testsaccording to the standard API 598: on strenght and tightness, tightness of backseat, closure tightness by low pressure, closure tightness by high pressure (on request). order specification: Data necessary for the order (standard API 600 is applied): type number, nominal diameter, pressure class, design (connection), wedge type, type of operation, material of body, cover, inner equipment, working parameters, required testing, accopanying documentation.

2 basic standard for construction basic construction design lenght flange dimension dimensions of welded ends testing dependence of maximal allowable pressure on temperature API 600 ASME B ASME B " - 36" MSS SP 44 (API 605) ASME B API 598 ASME B 16.34

3 applied standards: ASME ASTM ASME API MSS NACE British standards: B 16.5 flange, pipeline and valve B designed dimensions B welding ends B valves - flanged, bolted and welded B screw threads, general purpose B larger steel flanged dimensions (substitute for API 605 and MSS SP-44) B 31.1 pipeline for chemical factories and refineries material specification part V,VIII, IX instrucions for vessels under pressure SPEC Q1 specification for quality systems SPEC 6D specification for pipeline valves 600 bolted cover of steel gate valve for oil and gas industries Std 598 valve inspections and testing Std 589 fire-resistant sealing and sealing material SPEC 5L standards for pipelines SP-6 SP-25 standard ends of contact surfaces for pipeline and valve flanges standard markings for valves, flanges and connecting components flanges fo steel pipelines method of magnetic testing method of radiographic testing visual inspection of steel castings SP-44 SP-53 SP-54 SP-55 SP-120 graphited sealing for valves with rising spindle (constructional requirements) MR ISO materials for H 2 S - for oil and gas industry MR materials resistant to cracking in the corrosive oil surrounding BS 1414 steel gate valve - flanged or welding ends for petrochemistry 1868 steel swing check valves - flanged or welding ends for petrochemistry 1873 steel globe valves and flanged swing check valves for petrochemistry 1560 round pipe flange, flanges and valves 2080 designed dimensions 5146 valve inspections and testing international standards: EN ISO 9001 ISO 5211 EN ISO / API 600 ISO / API 6D ISO 5208 quality system designed dimensions of actuators to valves type of document for inspection bolted cover of steel gate valves for petrochemistry petrochemistry - transfer pipeline system - pipeline valves industrial valves - valve testing with pressure

4 designed dimensions Class 150 2" /4" " " 22 3" " 30 4" " 45 6" /8" 75 8" /4" " /8" " /8" " /8" " /4" " " " " " /8" " /4" " /4" " " " " " /2" " /2" " " " /2" Class 300 2" /4" " " 36 3" " 45 4" " 73 6" /4" 158 8" /8" " /8" " /8" " /4" " " " " " /8" " /4" " /4" " /4" Class 600 2" /4" " " 46 3" " 64 4" /8" 120 6" /8" 300 8" /8" " " " " " /8" " /8" " /4" " /4" " " 4 300

5 Class 900 2" " 93 3" /8" 115 4" /4" 180 6" /8" 375 8" " " /8" " /8" Class " " 93 3" /4" 162 4" /8" 240 6" /4" 600 8" /8" " /4" " /4" 2 730

6 standard material specification name WCB LCC trim no. 1 body 2 cover 3 wedge - variants LCB WC6 1, 2, 5, 8, 9, 8, 10, 12, , 8 10, 11, 12, 16 A 216 WCB A 352 LCC A 217 LCB A 217 WC6 A 216 WCB A 352 LCC A 217 LCB A 217 WC6 A 182 F6a A A 182 F6a A 182 F6a A 216 WCB A 352 LCC A 352 LCC A 182 F9 A 105 A 217 WC6 A 217 CA15 4 seat A 106 B A 350 LF2 mod. A 350 LF2 A 182 F5 5 bolt - variants M A 320 L7M A 320 L7M 6 nut M A 194 7M A 194 7M 7 handwheel ASTM A 47, A gland flange A spindle nut A 439 D2 (Ni-Resist) 10 wheel nut ASTM A yoke nut carbon steel 12 eyebolt A 307 Gr B 13 pin carbon steel 14 nut 15 grease box commercial 16 label AISI bearing commercial 18 bolt 19 nut 20 bolt 21 nut 22 cover A 217 LCC A 217 LCC 23 yoke A 217 LCC A 217 LCC trim - material according to API 600 name sealing surface of wedge sealing surface of seat spindle insert of check valve - variants packing box latern ring 1 overlay 13 Cr overlay 13 Cr trim no. 5 8 Stelit 6 overlay 13 Cr Stelit 6 Stelit 6 A T A 182 F6a Cl.4 A 182 F6a A 182 F6a C5 5, 16 A 217 C5 A 217 C5 A 182 F9 A 217 C5 A 182 F5 A 216 WCB A 216 WCB C12 5, 16 A 217 C12 A 217 C12 A 182 F9 A 216 C12 A 182 F321 (material design of bodies even acc. to customer s requirements) 2 overlay 304 overlay 304 sealing - material design name Class material desing of bodies WCB LCC WC6 C5 C12 CF8M CF8C CF3 CF8 CN7M Gr. 4A 1 cover sealing 150 graphited gasket 300 spiral graphited sealing 600, 900, 1500 RTJ rings 2 gland packing sealing set of graphited cords and graphited rings 9 monel (or according to customer s requirements)

7 name trim no. CF8M 2, 9, 10 12, 16 CF8C 2, 9, 10, 12, 16, F321 CF3 CF8 CN7M 2, 9, 10, 2, 9, 10, 13, 14 12, 16 12, 16 Gr.4A SAF body cover C C A 351 CF3 A 351 CF3 A 351 CN7M A 351 CN7M A 890 Gr.4A A 890 Gr.4A 3 wedge - variants A 182 F321 Alloy C A 351 CF7N A 351 CFN A 890 4A A 890 4A 4 5 seat bolt - variants Alloy A 193 B8M A 193 B8M A 193 B8M A 193 B8M A 193 B8M A 193 B8M 6 nut 7 handwheel ASTM A 47, A gland flange spindle nut wheel nut yoke nut eyebolt pin nut grease box label bearing bolt nut bolt nut cover yoke C A 439D2 (Ni-Resist) ASTM A 47 A 193 B8M commercial AISI 304 commercial A 193 B8M A 193 B8M A 351 CF3 A 351 CF7N A 890 4A name trim no sealing surface of wedge overlay 316 overlay 316 Stelit 6 overlay Alloy 20 Alloy 20 sealing surface of seat overlay 316 Stelit 6 Stelit 6 Stelit 6 Alloy 20 Stelit 6 spindle insert of check valve packing box 19Cr - 29Ni latern ring design Class sliding ball ball non-flooded non-flooded yoke bearing bearing bearing packing packing cover cover - yoke and larger 36 after consultation basic and larger and larger 30 basic after consultation and larger , 14 and larger basic after consultation and larger 6, 8 and larger basic after consultation and larger 6, 8 and larger basic after consultation and larger , 8 and larger , 8 and larger

8 quality system: The whole manufacturing process is completely monitored and includes the following tests and inspections: acceptance inspections of all input materials and sub-deliveries, inspections of particular components in the course of manufacture, assembly testing, pressure testing, operating testing, non-destructive testing and final inspections of finished product. testing: MSA, a.s. executes the whole range of special tests which verify the properties of valves. They are as follow: pressure testing All pressure tests are executed according to API 598, API 600, API 6D and DIN MSA, a.s. also performs standardly the special tests according to API 6D. A criterium for acceptance is zero permeability. At the same time, MSA, a.s. executes standardly testing at full operating pressure by which a possible leakage could be detected in the body-cover joint, spindle, fittings or grease box etc. fire testing Fire test is executed at MSA, a.s. according to the standard API 6FD, API 607 and BS 6755, part 2, for pressure class 150, 300, 600, 900 and testing on seal strenght Test on seal strenght is executed with methan. cycle testing Cycle test is executed by 3000 cycles (open-close) with water. hydrodynamic and aerodynamic testing MSA, a.s executes this test for the verification of hydropneumatic and aerodynamic properties. operating testing Operating test is executed on all valves at MSA, a.s. non-destructive testing MSA, a.s. executes the non-destructive test in the own facilities and testing room. The non-destructive test includes RT, MT, UT or DP testing. The testing operators are higly qualified and certified according to EN 473 or STN-TC-1A. visual inspection Visual inspection is performed at all castings that are used for the valves of MSA, a.s. according to the quality directive MSS SP-55 for steel castings and according to order specifications. certification: Quality system of MSA, a.s. is based on the strict observation of EN ISO 9001:2000 and API Spec Q1 (Specification D - number 0239). research and development: Specialists of MSA, a.s. work on the development and research of new products and verify their properties as well such as: - suitability of applied material - strenght and rigidity of construction (FEM method) - operability with the emphasis on strenght and controlability - hydraulic and aerodynamic properties etc. New products are tested in the testing room of MSA, a.s. as well as in real operating conditions. The properties of product are observed during the whole service life and findings are applied in the development and production of new products.