API STD 594

API - American Petroleum Institute

Check Valves: Flanged, Lug, Wafer, and Butt-welding - Seventh Edition

Organization:

Year: 2010

Abstract: This international standard covers design, material, face-to-face dimensions, pressure-temperature ratings, and examination, inspection, and test requirements for two types of check valves.
— Type ‘A' check valves are short face-to-face as defined in Table 3 and Table 4 and can be: wafer, lug, or double flanged; single plate or dual plate; gray iron, ductile iron, steel, nickel alloy, or other alloy designed for installation between Classes 125 and 250 cast iron flanges as specified in ASME B16.1, between Classes 150 and 300 ductile iron flanges as specified in ASME B16.42, between Classes 150 and 2500 steel flanges as specified in ASME B16.5, and between Classes 150 and 600 steel pipeline flanges as specified in MSS SP-44 or steel flanges as specified in ASME B16.47.
— Type ‘B' bolted cover swing check valves are long face-to-face as defined in 5.1.2 and can be: flanged or buttwelding ends of steel, nickel alloy, or other alloy material. End flanges shall be as specified in ASME B16.5 or ends shall be butt-welding as specified in ASME B16.25.
This standard covers the following ranges:
— Type ‘A' valves:
a) Classes 125 and 250, 50 ≤ DN ≤ 1200 (2 ≤ NPS ≤ 48) (excluding DN 90 [NPS 3¹/₂]);
b) Classes 150 and 300, 50 ≥ DN ≤ 1200 (2 ≤ NPS ≤ 48)*;
c) Class 600, 50 ≤ DN ≤ 1050 (2 ≤ NPS ≤ 42)*;
d) Classes 900 and 1500, 50 ≤ DN ≤ 600 (2 ≤ NPS ≤ 24)*;
e) Class 2500, 50 ≤ DN ≤ 300 (2 ≤ NPS ≤ 12)*;
— Type ‘B' valves:
a) Classes 150 through 1500, 50 ≤ DN ≤ 600 (2 ≤ NPS ≤ 24)*;
b) Class 2500, 50 ≤ DN ≤ 300 (2 ≤ NPS ≤ 12)*.
NOTE *Valve sizes DN 90 and DN 125 (NPS 3¹/₂ and 5) are non-preferred sizes whose usage is discouraged.
— Sizes:
NPS: 2, 2 ¹/₂, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24, 30, 36, 42, 48;
corresponding to nominal pipe sizes DN:
DN: 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600, 750, 900, 1050, 1200.
Information to be specified by the purchaser is shown in Annex A.
The standard nomenclature for valve parts is shown in Annex B. Figure B.1, Figure B.2, Figure B.3, and Figure B.4 illustrate typical Type ‘A' check valves and Figure B.5 illustrates a typical Type ‘B' check valve. These figures show typical designs only and are not to be construed as precluding other available designs that comply with the requirements of this standard. The only purpose of these figures is to identify part names. The construction of a valve is acceptable only when it complies with this standard in all respects.

URI: https://yse.yabesh.ir/std/handle/yse/107428

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contributor author	API - American Petroleum Institute
date accessioned	2017-09-04T16:44:07Z
date available	2017-09-04T16:44:07Z
date copyright	09/01/2010
date issued	2010
identifier other	VWENZCAAAAAAAAAA.pdf
identifier uri	https://yse.yabesh.ir/std/handle/yse/107428
description abstract	This international standard covers design, material, face-to-face dimensions, pressure-temperature ratings, and examination, inspection, and test requirements for two types of check valves. — Type ‘A' check valves are short face-to-face as defined in Table 3 and Table 4 and can be: wafer, lug, or double flanged; single plate or dual plate; gray iron, ductile iron, steel, nickel alloy, or other alloy designed for installation between Classes 125 and 250 cast iron flanges as specified in ASME B16.1, between Classes 150 and 300 ductile iron flanges as specified in ASME B16.42, between Classes 150 and 2500 steel flanges as specified in ASME B16.5, and between Classes 150 and 600 steel pipeline flanges as specified in MSS SP-44 or steel flanges as specified in ASME B16.47. — Type ‘B' bolted cover swing check valves are long face-to-face as defined in 5.1.2 and can be: flanged or buttwelding ends of steel, nickel alloy, or other alloy material. End flanges shall be as specified in ASME B16.5 or ends shall be butt-welding as specified in ASME B16.25. This standard covers the following ranges: — Type ‘A' valves: a) Classes 125 and 250, 50 ≤ DN ≤ 1200 (2 ≤ NPS ≤ 48) (excluding DN 90 [NPS 3¹/₂]); b) Classes 150 and 300, 50 ≥ DN ≤ 1200 (2 ≤ NPS ≤ 48); c) Class 600, 50 ≤ DN ≤ 1050 (2 ≤ NPS ≤ 42); d) Classes 900 and 1500, 50 ≤ DN ≤ 600 (2 ≤ NPS ≤ 24); e) Class 2500, 50 ≤ DN ≤ 300 (2 ≤ NPS ≤ 12); — Type ‘B' valves: a) Classes 150 through 1500, 50 ≤ DN ≤ 600 (2 ≤ NPS ≤ 24); b) Class 2500, 50 ≤ DN ≤ 300 (2 ≤ NPS ≤ 12). NOTE *Valve sizes DN 90 and DN 125 (NPS 3¹/₂ and 5) are non-preferred sizes whose usage is discouraged. — Sizes: NPS: 2, 2 ¹/₂, 3, 4, 6, 8, 10, 12, 14, 16, 18, 20, 24, 30, 36, 42, 48; corresponding to nominal pipe sizes DN: DN: 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500, 600, 750, 900, 1050, 1200. Information to be specified by the purchaser is shown in Annex A. The standard nomenclature for valve parts is shown in Annex B. Figure B.1, Figure B.2, Figure B.3, and Figure B.4 illustrate typical Type ‘A' check valves and Figure B.5 illustrates a typical Type ‘B' check valve. These figures show typical designs only and are not to be construed as precluding other available designs that comply with the requirements of this standard. The only purpose of these figures is to identify part names. The construction of a valve is acceptable only when it complies with this standard in all respects.
language	English
title	API STD 594	num
title	Check Valves: Flanged, Lug, Wafer, and Butt-welding - Seventh Edition	en
type	standard
page	34
status	Active
tree	API - American Petroleum Institute:;2010
contenttype	fulltext