SIST EN ISO 16139:2006/A1:2019 PDF

Overview

EN ISO 16139:2006/A1:2019 (CEN endorsement of ISO 16139:2006 Amendment 1) amends the international standard for industrial gate valves made from thermoplastic materials. The amendment updates the nominal diameter (DN) and pressure rating (PN/Class) ranges, material and testing references, and specific design and performance requirements. It also includes Annex ZA linking the standard to the EU Pressure Equipment Directive (2014/68/EU) for presumption of conformity where applicable.

Key scope items added by Amendment 1

• Declared DN range: DN 10 to DN 350 (specific DN values listed).
• Declared pressure ratings: PN 6, PN 10, PN 16 and Class 150.
• Material types covered: ABS, PE, PP, PVC-C, PVC-U, PVDF.

Key topics and technical requirements

• Materials and selection: Valve body and bonnet/cover materials must be selected from specified ISO standards (ISO 15493, ISO 15494, ISO 10931) and conform to the listed thermoplastic materials.
• Design strength and testing: Design strength is verified through the body pressure test and long-term behaviour test of the complete valve in accordance with ISO 9393-2.
• Face-to-face dimensions: For flanged valves, dimensions are to be selected from EN 558; for other end connections they are manufacturer-defined.
• Leak-tightness and seat testing: Seat and packing/shell leaktightness must be demonstrated on complete valves per ISO 9393-2 requirements.
• Rating factors (f): Amendment 1 updates Table 1 to provide minimum rating factors for a design lifetime up to 25 years, by material and temperature (values provided for ABS, PE, PP, PVC-C, PVC-U, PVDF). Manufacturers may declare additional rating factors where noted.
• Manual operation forces: Manual opening/closing forces are governed by EN 12570 limits and must maintain serviceability after applied forces.
• Regulatory linkage: Annex ZA maps clauses to essential requirements of Directive 2014/68/EU (Pressure Equipment Directive).

Practical applications and users

• Useful for manufacturers designing and producing thermoplastic gate valves to meet harmonized European and ISO requirements.
• Reference for testing laboratories and quality assurance teams to verify design strength, leak-tightness and long-term behavior.
• Used by procurement/specification engineers, plant designers and asset owners specifying valves for chemical processing, water treatment and industrial fluid systems where thermoplastic valves are preferred.
• Helps notified bodies and conformity assessors evaluate compliance with the Pressure Equipment Directive when the standard is cited in the Official Journal.

Related standards (key references)

• ISO 9393-2 (design and long-term testing)
• EN 558 (face-to-face dimensions)
• EN 12266-1 (testing procedures and acceptance)
• EN 12570 (operation forces)
• ISO 12162, ISO 15493, ISO 15494, ISO 10931 (material system specifications)

Keywords: EN ISO 16139, gate valves, thermoplastic valves, industrial valves, PVDF, PVC-U, rating factor, design strength, pressure equipment directive.