1/2"-300LB Close Die Forged Stainless Steel Globe Valve

1/2″-300LB Close Die Forged Stainless Steel Globe Valve

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Description

Forged Steel Globe Valve Technical Data Sheet (API 602)

F304 Material 1/2″ 300LB Butt Weld Ends

1. General Information

Item Specification
Valve Type Forged Steel Globe Valve
Design Standard API 602 / ASME B16.34 / BS 5352
Nominal Size 1/2 inch (DN15)
Pressure Class Class 300 LB (PN50)
Bonnet Type OS&Y (Outside Screw and Yoke), Bolted Bonnet
Connection Type Butt Weld Ends (BW)
Operation Handwheel
Body Material ASTM A182 F304 (Forged Austenitic Stainless Steel)

2. Applicable Standards

Item Standard Code
Design & Manufacturing API 602, ASME B16.34, BS 5352
Face-to-Face / End-to-End ASME B16.10 / Manufacturer Standard
Butt Weld Ends ASME B16.25
Test & Inspection API 598
Pressure-Temperature Rating ASME B16.34
Valve Marking MSS SP-25

3. Main Design Features

  • Body Construction: One-piece die forged body, dense structure, high strength, no casting defects, excellent corrosion resistance

  • Bonnet Connection: Bolted bonnet design with stainless steel/flexible graphite spiral wound gasket sealing

  • Disc Design: Renewable disc type, hardfaced seating surface

  • Stem Design: Backseat feature allows packing replacement under pressure when valve is fully open

  • Operating Characteristics: Disc moves linearly along seat centerline, short stroke, reliable shut-off

  • Seat Design: Metal-to-metal seating for durability

  • Packing: Flexible graphite packing, low emission design

4. Main Component Materials (F304 Material)

Item Part Name Material Standard/Remark
1 Body ASTM A182 F304 Forged Austenitic Stainless Steel
2 Bonnet ASTM A182 F304 Forged Austenitic Stainless Steel
3 Disc ASTM A182 F304 + STL Hardfaced with Stellite
4 Seat Integral / STL Hardfaced Machined directly on body or hardfaced
5 Stem ASTM A182 F304 Stainless Steel
6 Gasket 304 + Flexible Graphite Spiral Wound
7 Packing Flexible Graphite Low emission design
8 Gland Bushing ASTM A182 F304 Stainless Steel
9 Gland Flange ASTM A182 F304 Stainless Steel
10 Bonnet Bolt ASTM A193 B8 Stainless Steel
11 Bonnet Nut ASTM A194 8 Stainless Steel
12 Handwheel ASTM A197 Malleable Cast Iron

5. Technical Parameters & Dimensions

5.1 Pressure-Temperature Ratings

Item Parameter
Nominal Pressure Class 300 LB (PN50)
Shell Test Pressure 7.7 MPa (Hydrostatic) [API 598]
High-Pressure Seat Test Pressure 5.7 MPa (Hydrostatic) [API 598]
Low-Pressure Pneumatic Test Pressure 0.5 – 0.7 MPa (Air) [API 598]
Temperature Range -29°C ~ 425°C (derating at higher temps)
Applicable Media Water, steam, oil, corrosive media

5.2 Dimensions (1/2″ Class 300 Butt Weld Ends)

Dimension Value Remark
End-to-End Length (L) 165 mm Butt Weld Ends, typical API 602 value
Height (H-OPEN) Approx. 196 mm Fully open position, reference
Handwheel Diameter (W) 100 mm Reference
Butt Weld OD 21.3 mm Matching 1/2″ Sch40/80 pipe
Butt Weld Wall Thickness (t) Per ASME B16.25 Bevel preparation per standard
Weight Approx. 2.5 kg Reference, may vary by manufacturer

5.3 End Connection Details

  • Butt Weld Ends (BW): Bevel preparation and dimensions per ASME B16.25, suitable for welding to pipe

6. Test & Inspection (API 598)

Test Item Test Pressure Medium Acceptance Criteria
Shell Test 7.7 MPa Water No visible leakage
High-Pressure Seat Test 5.7 MPa Water No visible leakage
Low-Pressure Seat Test 0.5 – 0.7 MPa Air No bubbles leakage
Test Duration Per API 598 — Hold time conforms to standard

7. Marking & Supply

  • Valve Marking: Per MSS SP-25, nameplate to include nominal size, pressure class, material, heat number, design standard, etc.

  • Flow Direction: Flow direction arrow marking on body

  • Cleaning & Protection: Valves internally and externally cleaned, ends covered with protectors

  • Documentation: Material certificates, pressure test reports, declaration of conformity provided with shipment

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