標準號：BS EN 14870-3-2006
中文標準名稱：石油和天然氣工業.管道運輸系統的吸入管彎頭、配件和法蘭.法蘭
英文標準名稱：Petroleum and natural gas industries - Induction bends, fittings and flanges for pipeline transportation systems - Flanges
標準類型：E98
發布日期：2006/3/31 12:00:00
實施日期：2006/3/31 12:00:00
中國標準分類號：E98
國際標準分類號：23.040.60;75.200
引用標準：ISO 148-1;ISO 377;ISO 2566-1;ISO 3183-1;ISO 3183-2
適用范圍：This part of EN 14870 applies to weldneck and blind flanges (full face, raised face, and RTJ groove) as well asanchor, swivel-ring flanges and orifice flanges.This part of EN 14870 specifies the technical requirements for carbon steel and low-alloy steel forged flangesfor use in pipeline transportation systems for the petroleum and natural gas industries as defined inISO 13623.This part of EN 14870 designates those categories of flanges that meet the industry's need to matchISO 3183 pipe. These flanges are for normal and low-temperature service and include supplementaryrequirements where required for sour service.Materials for, or the attachment of, factory-welded extensions, bolting materials, gaskets, slip-on flanges orflanged fittings are not covered by this part of EN 14870.This part of EN 14870 is not applicable to integrally cast or forged flanges for valves, pumps or otherequipment.This part of EN 14870 does not cover the selection of the flange category or pressure class. Sizes andpressure classes listed in ISO 7005-1 and applicable to this part of EN 14870 are as follows:? DN 10 (NPS 1/2) to DN 1500 (NPS 60);? PN 20 (class 150), PN 50 (class 300), PN 100 (class 600), PN 150 (class 900), PN 250 (class 1500),PN 420 (class 2500).On-land supply systems used by the gas supply industry are excluded from the scope of this document.