DN50-PN40 Closed Die Forged Steel Globe Valve

Design Standard API 602 / ASME B16.34 / BS 5352
Nominal Size DN50 (2 inch)
Pressure Class PN40 (Class 300 LB)
Bonnet Type OS&Y (Outside Screw and Yoke), Bolted Bonnet
Connection Type Welded Flange
Operation Handwheel
Body Material ASTM A105N (Forged Carbon Steel)

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Forged Steel Globe Valve Technical Data Sheet (API 602)

A105N Material DN50 PN40 Welded Flange

General Information

Item	Spesifikasi
Jenis Katup	Forged Steel Globe Valve
Design Standard	API 602 / ASME B16.34 / BS 5352
Ukuran Nominal	DN50 (2 inch)
Pressure Class	PN40 (Class 300 LB)
Bonnet Type	OS&Y (Outside Screw and Yoke), Bolted Bonnet
Connection Type	Welded Flange
Operasi	Handwheel
Bahan Tubuh	ASTM A105N (Forged Carbon Steel)

Applicable Standards

Item	Standard Code
Design & Manufacturing	API 602, ASME B16.34, BS 5352
Face-to-Face / End-to-End	ASME B16.10
Flanged Connections	ASME B16.5 (PN40/Class 300)
Test & Inspection	API 598
Pressure-Temperature Rating	ASME B16.34
Valve Marking	MSS SP-25

Main Design Features

Konstruksi Bodi: One-piece die forged body, dense structure, high strength, eliminates casting defects
Bonnet Connection: Bolted bonnet design with 316/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 or STL hardfacing for durability
Packing: Flexible graphite packing, low emission design

Main Component Materials (A105N Material)

Item	Part Name	Bahan	Standard/Remark
1	Tubuh	ASTM A105N	Forged Carbon Steel, suitable for NACE MR0175
2	Bonnet	ASTM A105N	Forged Carbon Steel
3	Cakram	ASTM A276 420 / A105N + STL	13Cr Stainless Steel or Hardfaced
4	Kursi	Integral / STL Hardfaced	Machined directly on body or hardfaced
5	Tangkai	ASTM A182 F6a (13Cr)	Stainless Steel
6	Gasket	316 + Flexible Graphite	Spiral Wound
7	Packing	Flexible Graphite	Low emission design
8	Gland Bushing	ASTM A276 410	Stainless Steel
9	Gland Flange	ASTM A105	Carbon Steel
10	Bonnet Bolt	ASTM A193 Gr.B7	Alloy Steel
11	Bonnet Nut	ASTM A194 Gr.2H	Heavy Hex Nut
12	Eye Bolt	ASTM A193 Gr.B7	Alloy Steel
13	Handwheel	ASTM A197	Malleable Cast Iron

Technical Parameters & Dimensions

5.1 Pressure-Temperature Ratings

Material Group: Group 1.1 (Carbon Steel)
Kisaran Suhu: -29°C ~ 425°C
Applicable Media: Water, steam, oil, etc.

5.2 Dimensions (DN50 PN40 Welded Flange)

Dimension	Value	Remark
End-to-End Length (L)	220 mm	Flanged ends, per API 602 standard dimensions
Height (H-OPEN)	Approx. 370 mm	Fully open position
Handwheel Diameter (W)	240 mm
Flange Diameter (D)	165 mm	ASME B16.5 Class 300 2″ RF
Bolt Circle Diameter	127 mm	ASME B16.5 Class 300 2″ RF
Number of Bolt Holes/Size	8 / 19 mm	ASME B16.5 Class 300 2″ RF
Flange Sealing Face	Raised Face	ASME B16.5
Weight	Approx. 18.0 kg	Bolted bonnet type, reference value

5.3 End Connection Details

Welded Flange: Flange dimensions per ASME B16.5 Class 300, Raised Face sealing, flange to be welded to pipe

Test & Inspection (API 598)

Test Item	Test Pressure (PN40/Class 300)	Medium	Acceptance Criteria
Shell Test	7.7 MPa (Hydrostatic)	Water	No visible leakage
High-Pressure Seat Test	5.7 MPa (Hydrostatic)	Water	No visible leakage
Low-Pressure Seat Test	0.5 – 0.7 MPa (Air)	Air	No bubbles leakage
Test Duration	Per API 598	—	Hold time conforms to standard

Marking & Supply

Valve Marking: Per MSS SP-25, nameplate to include material, pressure, heat number, etc.
Cleaning & Protection: Valves internally and externally cleaned, flange faces covered with protectors and coated with rust preventive
Documentation: Material certificates, pressure test reports, declaration of conformity provided with shipment

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