国外PTFE标准

标准号 标准名称 英文名称
ASTM D1675-032011 聚四氟乙烯管的试验方法 Test Methods for Polytetrafluoroethylene Tubing
ASTM D2686-062012) 聚四氟乙烯压敏电绝缘胶带规范 Specification for Polytetrafluoroethylene-backed Pressure-Sensitive Electrical Insulating Tape
ASTM D1710-08 聚四氟乙烯(PTFE)基本型材,棒材和厚壁管材 Polytetrafluoroethylene (PTFE) Basic Shapes, Rod and Heavy-Walled Tubing
ASTM D3295-06(2011) 聚四氟乙烯管 Standard Specification for PTFE Tubing, Miniature Beading and Spiral Cut Tubing
ASTM D3369-01 聚四氟乙烯树脂浇铸薄膜 Polytetrafluoroethylene (PTFE) Resin Cast Film
ASTM D4441-04(2010) 聚四氟乙烯的水分散体规范 Standard Specification for Aqueous Dispersions of Polytetrafluoroethylene
ASTM D4745-11 聚四氟乙烯模压和挤出材料的填充化合物 Standard Specification for Filled Compounds of Polytetrafluoroethylene (PTFE) Molding and Extrusion Materials
ASTM D4894-07 聚四氟乙烯造粒料和柱塞挤出料规范 Specification for Polytetrafluoroethylene (PTFE) Granular Molding and Ram
ASTM D4895-10 聚四氟乙烯分散树脂规范 Specification for Polytetrafluoroethylene (PTFE) Resins Produced from Dispersion
ASTM D4969-07(2012) 聚四氟乙烯(PTFE)涂覆玻璃织物 Standard Specification for Polytetrafluoroethylene-(PTFE) Coated Glass Fabric
ASTM D3308-12 聚四氟乙烯车削膜 Standard Specification for PTFE Resin Skived Tape
ASTM D6040-12 非烧结聚四氟乙烯(PTFE)挤出薄膜或带的试验方法 Standard Guide to Standard Test Methods for Unsintered Polytetrafluoroethylene (PTFE) Extruded Film or Tape
ASTM D6457-08(2013) 聚四氟乙烯挤出和模压棒和厚壁管 Specification for Extruded and Compression Molded Rod and Heavy Walled Tubing Made from Polytetrafluoroethylene (PTFE)
ANSI/ASTM D1457-1992 聚四氟乙烯(PTFE)模塑和挤出材料规范(08.01) Specification for Polytetrafluoroethylene (PTFE) Molding and Extrusion Materials (08.01)
ANSI/NEMA HP3-2000 电子和电气用ET(250V)E(600V)EE(1000V)PTFE(聚四氟乙烯)绝缘高温架空电线 Electrical and Electronic PTFE (Polytetrafluoroethylene) Insulated High Temperature Hook-Up Wire, Types ET (250 Volt), E (600 Volt) and EE (1000 Volt)
ASTM D1457-1992 聚四氟乙烯模塑及挤压成型物料 Polytetrafluoroethylene (PTFE) Molding and Extrusion Materials
ASTM D3293-1991 聚四氟乙烯树脂模压薄板 PTFE Resin Molded Sheet
ASTM E911-1998 有聚四氟乙烯(PTFE)插头的玻璃管旋塞阀标准规范 Standard Specification for Glass Stopcocks with Polytetrafluoroethylene (PTFE) Plugs
ASTM D1710-2002 挤制和压模聚四氟乙烯(PTFE)杆材和厚壁管材的标准规范 Standard Specification for Extruded and Compression Molded Polytetrafluoroethylene (PTFE) Rod and Heavy-Walled Tubing
ASTM D3294-2003 聚四氟乙烯树脂模压薄板和基本模压型材的标准规范 Standard Specification for PTFE Resin Molded Sheet and Molded Basic Shapes
ASTM D6457-2004 聚四氟乙烯制挤压和压缩模塑杆和厚壁管的标准规范 Standard Specification for Extruded and Compression Molded Rod and Heavy-Walled Tubing Made from Polytetrafluoroethylene (PTFE)
ASTM D6585-2005 非烧结聚四氟乙烯(PTEE)挤制薄膜或带材的标准规范 Standard Specification for Unsintered Polytetrafluoroethylene (PTFE) Extruded Film or Tape
ASTM D7193-2005 非饱和加色剂的聚四氟乙烯(PTFE)挤制薄膜或窄条带材的标准规范 Standard Specification for Unsintered Pigmented Polytetrafluoroethylene (PTFE) Extruded Film or Tape
ASTM D1675-2003 聚四氟乙烯管的标准试验方法 Standard Test Methods for Polytetrafluoroethylene Tubing
ASTM D2686-2006 聚四氟乙烯背面压敏电绝缘胶带的规范 Standard Specification for Polytetrafluoroethylene-Backed Pressure-Sensitive Electrical Insulating Tape
NF C93-643-145-2002 绝缘软套管.3部分:各种型号套管的规范.145-147:挤压聚四氟乙烯套管 (Flexible insulating sleeving - Part 3 : specifications for individual types of sleeving - Sheets 145 to 147 : extruded PTFE sleeving.)
NF C93-643-201-1993 软绝缘套筒规范.3部分:专用套筒的规范要求.240 -243 活页:热收缩聚四氟乙烯(PTFE)套筒 (Specification for flexible insulating sleeving. Part 3 : specification requirments for individual types of sleeving. Sheet 201 : heat shrinkable sleeving, general purpose, flexible, cross-linked PVC, shrink ratio 2:1.)
NF E29-902-3-1997 法兰及其接头.PN指定法兰用垫圈的尺寸.3部分:非金属聚四氟乙烯封装垫圈 (Flanges and their joints. Dimensions of gaskets for PN-designated flanges. Part 3 : non-metallic PTFE envelope gaskets.)
NF S60-202-1994 防火.灭火介质.卤代烃.1部分:聚四氟乙烯1211和聚四氟乙烯1301规范 (Fire protection. Fire extinguishing media. Halogenated hydrocarbons. Part 1 : specification for halon 1211 and halon 1301.)
NF C93-643-240-2003 绝缘软管.3部分:各种型号软管规范.240243:热收缩聚四氟乙烯绝缘软套管(PTFE) (Flexible insulating sleeving - Part 3 : specifications for individual types of sleeving - Sheets 240 to 243 : heat-shrinkable PTFE sleeving.)
NF S60-205-1994 防火.灭火介质.卤代烃.2部分:聚四氟乙烯1211和聚四氟乙烯1301安全操作和运输规程的实施标准 (FIRE PROTECTION. FIRE EXTINGUISHING MEDIA. HALOGENATED HYDROCARBONS. PART 2 : CODE OF PRACTICE FOR SAFE HANDLING AND TRANSFER PROCEDURES OF HALON 1211 AND HALON 1301. (EUROPEAN STANDARD EN 27201-2).)
NF T47-820-7-2001 结构轴承.7部分:球柱和滚柱聚四氟乙烯轴承 (Structural beairings - Part 7 : spherical and cylindrical PTFE bearings.)
NF C93-585-2-2002 射频电缆.规范.2部分:聚四氟乙烯绝缘的半硬性射频和同轴电缆.分规范 (Radio-frequency cables - Specifications - Part 2 : semi-rigid radio-frequency and coaxial cables with polytetrafluoroethylene (PTFE) insulation - Sectional specification.)
NF T51-550-2-1998 塑料.聚四氟乙烯(PTFE)半成品.2部分:试样的制备和特性的测定 (PLASTICS. POLYTETRAFLUOROETHYLENE (PFTE) SEMI-FINISHED PRODUCTS. PART 2 : PREPARATION OF SPECIMENS AND DETERMINATION OF PROPERTIES. (EUROPEAN STANDARD EN ISO 13000-2).)
NF T51-550-1-1998 塑料.聚四氟乙烯(PTFE)半成品.1部分:要求和标识 (PLASTICS. POLYTETRAFLUOROETHYLENE (PTFE) SEMI-FINISHED PRODUCTS. PART 1 : REQUIREMENTS AND DESIGNATION. (EUROPEAN STANDARD EN ISO 13000-1).)
EN 60454-3-14-2001 电工用压敏粘带 第3部分:.单项材料规范 活页14:涂压敏粘合剂的聚四氟乙烯薄膜带 Pressure-sensitive adhesive tapes for electrical purposes - Part 3: Specifications for individual materials; Sheet 14: Polytetrafluoroethylene film tapes with pressure-sensitive adhesive (IEC 60454-3-14:2001)
EN 60684-3-145 bis 147-2001 绝缘软管 第3部分:各种型号软管规范 活页145147:挤压聚四氟乙烯(PTFE)软管 Flexible insulating sleeving - Part 3: Specifications for individual types of sleeving; Sheets 145 to 147: Extruded PTFE sleeving (IEC 60684-3-145 to 147:2001)
EN 61196-2-2003 射频电缆 规范 第2部分:聚四氟乙烯(PTFE)绝缘半硬射频同轴电缆分规范 Radio-frequency cables - Part 2: Sectional specification for semi-rigid radio-frequency and coaxial cables with polytetrafluoroethylene (PTFE) insulation (IEC 61196-2:1995) / Note: Endorsement notice
EN ISO 13000-1-1997 塑料 聚四氟乙烯(PTFE)半成品  第1部分:要求和命名 Plastics - Polytetrafluoroethylene (PTFE) semi-finished products - Part 1: Requirements and designation (ISO 13000-1:1997)
EN ISO 13000-2-1997 塑料 聚四氟乙烯(PTFE)半成品  第2部分:试样的制备和性能的测定 Plastics - Polytetrafluoroethylene (PTFE) semi-finished products - Part 2: Preparation of test specimens and determination of properties (ISO 13000-2:1997)
EN 751-3-1996+AC-1997 接触第123家庭用燃气和热水的金属螺纹接头的密封材料 第3部分:非烧结过的聚四氟乙烯密封带 Sealing materials for metallic threaded joints in contact with 1st, 2nd and 3rd family gases and hot water - Part 3: Unsintered PTFE tapes
EN 60684-3-240 bis 243-2002 绝缘软套管 第3部分:个别型号套管规范 活页240243:热收缩聚四氟乙烯套管 Flexible insulating sleeving - Part 3: Specifications for individual types of sleeving; Sheets 240 to 243: Heat-shrinkable PTFE sleeving (IEC 60684-3-240 to 243:2002) / Note: Endorsement notice
UL 2006-1997 聚四氟乙烯1211的回收/再利用设备 (Halon 1211 recovery/recharge equipment )
UL 2083-1996 聚四氟乙烯1301回收/再利用设备 (Halon 1301 recovery/recycling equipment )
BS 2782-3 Method 327A-1993 塑料试验方法.3部分:机械性能.方法327A:聚四氟乙烯制品抗拉强度与断裂伸长率测定 Methods of testing plastics - Mechanical properties - Determination of tensile strength and elongation at break of polytetrafluoroethylene (PTFE) products
BS 6564-3-1990 聚四氟乙烯(PTFE)材料和制品.3部分:填充聚四氟乙烯的E类玻璃纤维规范 Polytetrafluoroethylene (PTFE) materials and products - Specification for E glass fibre filled polytetrafluoroethylene
JIS K6896-1995 模塑材料和挤压材料用的聚四氟乙烯粉末

Polytetrafluoroethylene powder for molding and extrusion materials

JIS K6893-1995 聚四氟乙烯水分散体的试验方法 Testing methods for polytetrafluoroethylene aqueous dispersion
JIS K6895-1995 聚四氟乙烯零部件尺寸的测定方法 Method for determination of dimension of polytetrafluoroethylene parts
BS 3G 210-1996 单芯和多芯镀银铜导体(190)或镀镍铜导体(260)聚四氟乙烯绝缘设备软线和电缆规范 Specification for PTFE insulated equipment wires and cables, single- and multi-core, with silver plated copper conductors (190 °C) or nickel plated copper conductors (260 °C)
BS 5306-5.2-1984 住宅灭火装置及设备.5部分:哈朗(聚四氟乙烯)灭火系统.2:哈朗(聚四氟乙烯)1211全溢流装置 Code of practice for fire extinguishing installations and equipment on premises - Halon systems - Halon 1211 total flooding systems
BS M 57-1985 航空航天用聚四氟乙烯高温盘旋状软管组件规范 Specification for high temperature convoluted hose assemblies in polytetrafluoroethylene (PTFE) for aerospace applications
BS M 56-1985 航空航天用聚四氟乙烯管密度和相对密度的测定方法 Methods for determination of density and relative density of polytetrafluoroethylene (PTFE) tubing for aerospace applications
BS EN 60454-3-14-2002 电工用压敏胶带规范.各项材料规范.涂压敏胶粘剂的聚四氟乙烯薄膜带.14活页:涂压敏胶粘剂的聚四氟乙烯薄膜 Specifications for pressure-sensitive adhesive tapes for electrical purposes - Specifications for individual materials - Polytetrafluoroethylene film tapes with pressure-sensitive adhesive - Sheet 14: Polytetrafluoroethylene film tapes with pressure-sensitive adhesive
BS EN 60684-3-145 to 147-2001 绝缘软套管规范.各型套管规格要求.挤制聚四氟乙烯套管 Specification for flexible insulating sleeving - Specification requirements for individual types of sleeving - Extruded PTFE sleeving - Extruded PTFE sleeving
BS EN 60684-3-240 to 243-2002 绝缘软套管.各种型号软套管规范要求.热收缩聚四氟乙烯(PTFE)绝缘软套管

Specification for flexible insulating sleeving - Specification requirements for individual types of sleeving - Heat-shrinkable PTFE sleeving

BS EN 61196-2-2003 射频电缆.规范.聚四氟乙烯(PTFE)绝缘半硬射频同轴电缆分规范 Radio-frequency cables - Specifications - Sectional specification for semi-rigid radio-frequency and coaxial cables with polytetrafluoroethylene (PTFE) insulation
BS EN ISO 13000-2-2006 塑料.聚四氟乙烯(PTFE)半成品.试样的制备和性能测定

Plastics - Polytetrafluoroethylene (PTFE) semi-finished products - Preparation of test specimens and determination of properties

BS EN ISO 13000-1-2006 塑料.聚四氟乙烯(PTFE)半成品.要求和名称与符号 Plastics - Polytetrafluoroethylene (PTFE) semi-finished products - Requirements and designation
BS EN 4166-2005 航空航天系列.三件弹簧张力夹具.聚四氟乙烯轴衬 Aerospace series - Clips, spring tension, three parts - PTFE bushes
BS EN 1337-7-2004 结构轴承.球面和圆柱形聚四氟乙烯轴承 Structural bearings Part 7: Spherical and cylindrical PTFE bearings
BS ISO 8829-2-2006 航空.聚四氟乙烯(PTFE)内软管组件试验方法.非金属编制物 Aerospace - Test methods for polytetrafluoroethylene (PTFE) inner-tube hose assemblies - Non-metallic braid
BS ISO 8913-2007 航空航天.轻型聚四氟乙烯(PTFE).分级:400 °F/3000 psi (204 /20684 kPa)204/21000 kPa (400 °F/304 Aerospace - Lightweight polytetrafluoroethylene (PTFE) hose assemblies, classification 400 °F/3000 psi (204 °C/20684 kPa) and 204 °C/21000 kPa (400 °F/3046 psi) - Procurement specification
DIN ISO 7258-1987 航空航天.航空航天用聚四氟乙烯(PTFE)软管.密度和相对密度的测定方法.ISO7258, 1984相同 Aerospace; polytetrafluoroethylene (PTFE) tubing for aerospace applications; methods for the determination of the density and relative density; identical with ISO 7258, edition 1984
DIN 65374-1989 航空航天.聚四氟乙烯.(PTFE)半成品和模压件.技术规范 Aerospace; polytetrafluoroethylene (PTFE) semi-finished products and moulded parts; technical specification
DIN 16782-2-1991 聚四氟乙烯(PTFE)模塑材料.试样的制备和性能测定 Polytetrafluoroethylene (PTFE) moulding materials; preparation of specimens and determination of properties
DIN 16782-1-1991 聚四氟乙烯(PTFE)模塑材料.分类和名称 Polytetrafluoroethylene (PTFE) moulding materials; classification and designation
DIN 28148-1992 搪瓷钢制搅拌容器的聚四氟乙烯外壳密封 PTFE envelope gaskets for glass lined agitator vessels
DIN 28091-3-1995 密封板的交货技术条件.3部分:聚四氟乙烯基密封材料.要求和试验 Technical delivery conditions for gasket sheets - Part 3: PTFE-based gasket materials (TF); requirements and testing
DIN ISO 10502-1997 航空航天.温度为230℃以下气压为10500KPa时使用的聚四氟乙烯(PTFE)软管.采购规范 Aerospace - Hose assemblies in polytetrafluoroethylene (PTFE) for use up to 232 °C and 10500 kPa - Procurement specification (ISO 10502:1992)
DIN 3535-6-1999 供气用密封垫.6部分:气阀、煤气设备和煤气主管道用基于合成纤维、石墨或聚四氟乙烯的密封垫材料 Gaskets for gas supply - Part 6: Gasket materials based on synthetic fibres, graphite or polytetrafluoroethylen (PTFE) for gas valves, gas appliances and gas mains
DIN 30660-1999 供气、供水及水暖设备用密封材料.家用设施金属螺纹连接用非硬化连接密封材料和聚四氟乙烯密封带 Sealing materials for gas and water supply as well as water heating systems - Non-hardening jointing compounds and polytetrafluoroethylene (PTFE) tapes for metallic threaded joints in domestic installations
DIN 2874-2002 带聚四氟乙烯或PFA衬里的钢制法兰管道和钢制与铸铁法兰配件.技术规范

Steel flanged pipes and steel and cast iron flanged fittings lined with PTFE or PFA - Technical specifications

DIN EN 60454-3-14-2002 电工用压敏胶带.3部分:各型材料规范.14:涂压敏粘合剂的聚四氟乙烯薄膜带(IEC 60454-3-14:2001) Pressure-sensitive adhesive tapes for electrical purposes - Part 3: Specifications for individual materials; Sheet 14: Polytetrafluoroethylene film tapes with pressure-sensitive adhesive (IEC 60454-3-14:2001); German version EN 60454-3-14:2001
DIN EN 60684-3-145 bis 147-2002 绝缘软套管.3部分:专用型套管规范.145活页和147活页:挤制聚四氟乙烯(PTFE)套管 (IEC 60684-3-145 to 147: Flexible insulating sleeving - Part 3: Specifications for individual types of sleeving; Sheets 145 to 147: Extruded PTFE sleeving (IEC 60684-3-145 to 147:2001); German version EN 60684-3-145 to 147:2001
DIN EN 60684-3-240 bis 243-2003 绝缘软管.3部分:各型软管规范.240243:热收缩聚四氟乙烯(PTFE)绝缘软管 Flexible insulating sleeving - Part 3: Specifications for individual types of sleeving; Sheets 240 to 243: Heat-shrinkable PTFE sleeving (IEC 60684-3-240 to 243:2002); German version EN 60684-3-240 to 243:2002
DIN EN 61196-2-2004 射频电缆.2部分:聚四氟乙烯绝缘的半刚性射频电缆和同轴电缆分规范 Radio-frequency cables - Part 2: Sectional specification for semi-rigid radio-frequency and coaxial cables with polytetrafluoroethylene (PTFE) insulation (IEC 61196-2:1995); German version EN 61196-2:2003
DIN EN 1337-7-2004 结构轴承.7部分:球面和柱面聚四氟乙烯轴承 Structural bearings - Part 7: Spherical and cylindrical PTFE bearings; German version EN 1337-7:2004
DIN EN ISO 13000-1-2006 塑料.聚四氟乙烯(PTFE)半成品.1部分:要求和名称与符号(ISO 13000-1-2005).德文版本 EN ISO 13000-1-2005 Plastics - Polytetrafluoroethylene (PTFE) semi-finished products - Part 1: Requirements and designation (ISO 13000-1:2005); German version EN ISO 13000-1:2005
DIN EN ISO 13000-2-2006 塑料.聚四氟乙烯(PTFE)半成品.2部分:试样的制备和特性的测定 (ISO 13000-2-2005).德文版本 EN ISO 13000- Plastics - Polytetrafluoroethylene (PTFE) semi-finished products - Part 2: Preparation of test specimens and determination of properties (ISO 13000-2:2005); German version EN ISO 13000-2:2005
IEC 61196-2-1995 射频电缆 第2部分:聚四氟乙烯(PTFE)绝缘半硬射频同轴电缆分规范 Radio-frequency cables - Part 2: Sectional specification for semi-rigid radio-frequency and coaxial cables with polytetrafluoroethylene (PTFE) insulation
IEC 60454-3-14-2001 电工用压敏粘带 第3部分:单项材料规范 活页14:涂压敏粘合剂的聚四氟乙烯薄膜带 Pressure-sensitive adhesive tapes for electrical purposes - Part 3: Specifications for individual materials; Sheet 14: Polytetrafluoroethylene film tapes with pressure-sensitive adhesive
IEC 60684-3-145 to 147-2001 绝缘软套管.3部分:各种型号套管的规范.145147活页:挤压聚四氟乙烯套管 Flexible insulating sleeving - Part 3: Specifications for individual types of sleeving; Sheets 145 to 147: Extruded PTFE sleeving
IEC 60684-3-240 to 243-2002 绝缘软管.3部分:各种型号软管规范.240243:热收缩聚四氟乙烯(PTFE)绝缘软管

Flexible insulating sleeving - Part 3: Specifications for individual types of sleeving; Sheets 240 to 243: Heat-shrinkable PTFE sleeving

ISO 7313-1984 航空器 聚四氟乙烯(PTFE)制的高温盘卷软管组件

Aircraft; High temperature convoluted hose assemblies in polytetrafluoroethylene (PTFE)

ISO 7258-1984 航空航天用聚四氟乙烯(PTFE)管材 密度和相对密度的测定方法

Polytetrafluoroethylene (PTFE) tubing for aerospace applications; Methods for the determination of the density and relative density

ISO 10502-1992 航空航天.温度为230℃及以下、压力为10500 kPa下使用的聚四氟乙烯(PTFE)软管组件.采购规范

Aerospace; hose assemblies in polytetrafluoroethylene (PTFE) for use up to 232 °C and 10500 kPa; procurement specification

ISO 9938-1994 航空航天 强度温度等级为204/28000 kPa的聚四氟乙烯软管组件 采购规范

Aerospace - Polytetrafluoroethylene (PTFE) hose assemblies, classification 204 C/28 000 kPa - Procurement specification

ISO 9528-1994 航空航天 等级为21000kPa/204℃标准型聚四氟乙烯(PTFE)软管组件 采购规范

Aerospace - Standard-weight polytetrafluoroethylene (PTFE) hose assemblies, classification 204 C/21 000 kPa - Procurement specification

ISO 13000-2-2005 塑料.聚四氟乙烯(PTFE)半成品.2部分:试样的制备和性能的测定

Plastics - Polytetrafluoroethylene (PTFE) semi-finished products - Part 2: Preparation of test specimens and determination of properties

ISO 13000-1-2005 塑料.聚四氟乙烯(PTFE)半成品.1部分:要求和名称与符号

Plastics - Polytetrafluoroethylene (PTFE) semi-finished products - Part 1: Requirements and designation

ISO 8829-2-2006 航空.聚四氟乙烯(PTFE)内软管组件试验方法.2部分:非金属编织物

Aerospace - Test methods for polytetrafluoroethylene (PTFE) inner-tube hose assemblies - Part 2: Non-metallic braid

ISO 8913-2006 航空航天.轻型聚四氟乙烯(PTFE)软管组件.等级:400/3000psi(204/20684kPa)204/21000 kPa(400/304 Aerospace - Lightweight polytetrafluoroethylene (PTFE) hose assemblies, classification 400 °F/3 000 psi (204 °C/20 684 kPa) and 204 °C/21 000 kPa (400 °F/3 046 psi) - Procurement specification
JIS K6884-1971 聚四氟乙烯的一般公差(机械切削)

General tolerance for polytetrafluoroethylene (Machine cut)

JIS K6892-1995 涂胶挤压用聚四氟乙烯粉料的试验方法

Testing methods for polytetrafluoroethylene powder for paste extrusion

JIS K6891-1995 聚四氟乙烯模塑粉料的试验方法

Testing methods for polytetrafluoroethylene molding powder

JIS K7137-1-2001 塑料.聚四氟乙烯(PTFE)半成品.1部分:要求与命名

Plastics -- Polytetrafluoroethylene (PTFE) semi-finished products -- Part 1: Requirements and designation

JIS K7137-2-2001 塑料.聚四氟乙烯(PTFE)半成品.2部分:试验样品制备和性能测定

Plastics -- Polytetrafluoroethylene (PTFE) semi-finished products -- Part 2: Preparation of test specimens and determination of properties

JIS K6885-2005 螺纹密封用未烧结聚四氟乙烯带

Unsintered polytetrafluoroethylene tapes for thread sealing