Product Name: Fire Fighting Grooved Pipe Fittings High Pressure Couplings Model NO.: 753159 Standard: Standard Material: Iron Flexible or Rigid: Flexible Structure: Vertical Connection: Grooved Working Pressure: 500psi 1000psi Trademark: JX or OEM Transport Package: Carton with Plywood Pallet or Wooden Box Specification: Standard Origin: Shandong, China Product Description Fire Fighting Grooved Pipe Fittings High Pressure Couplings Heavy-duty flexible couplings are one type of flexible couplings which are applied for high pressure environments. They are mainly used for grooved pipe connections where adjacent pipe ends allow a certain amount of relative angular displacement and corresponding axial rotation.Application:Heavy-duty flexible couplings are suitable for medium and high pressure pipeline systems with nominal pressure 175-750 PSI, nominal size DN50-DN200, temperature range of - 20 ºC-+180ºC, which are widely applied in water supply and drainage, fire-fighting, air conditioning, etc. Bolts/Nuts:ANSI Heavy Hex Nut1. Material: SAE J995 2.2.Thread: ANSI B 1.1-1982, class 2B. 3.Surface Treatment: Zinc electroplated per ASTM B633 CLASS FE/ZN5 TYPE III, thickness ≥ 5μm per class SC1.Metric Heavy Hex Nut 1. Material: ISO 898-2:1992 GB/T3098.2-2000 Class 8.2.Thread: ISO 261, tolerance 6h for M10& M12, 7h for M16 and above.3.Surface Treatment: Zinc Electroplated followed by a yellow chromate dip per ISO 2081 FE/ZN5, ISO4520 CLASS 1A. Hexagon Flange Nut: Dimension according to DIN6923 ANSI Oval Neck Track Bolt 1. Material: SAE J429 5.2.Thread: UNC thread per ANSI B 1.1 Class 2A.3.Surface Treatment: Silver chromate electroplated per ASTM B633 CLASS FE/ZN5 TYPEIII, thickness ≥ 5μm per class SC1. Metric Oval Neck Track Bolt 1. Material: ISO 898-1: 1992 GB/T3098.1-2000 Class 8.8.2.Thread: ISO metric thread per ISO 261, tolerance 6h.3.Surface Treatment: Yellow chromate electroplated per ISO 2081 FE/ZN5 ISO4520 CLASS 1A.Nominal SizePipe O.D.Maximum Working PressureDimensionsBolt/ NutNo. - SizeInchmmpsiXmmYmmZmmmm260.350010009113346.52 1/2 x 752 1/27310416546.52 1/2 x 753 O.D76.110716546.52 1/2 x 75388.912217147.02 1/2 x 754114.3151.521352.02 5/8 x 855141.318224152.02 3/4 x 1156 1/2 O.D165.120828152.02 3/4 x 1156168.321028652.02 3/4 x 1158219.126835462.02 7/8 x 140FAQQ: Are you trading company or manufacturer ?A: We are a factory.Q: How long is your delivery time?A: Generally 15 days after the down payment. OEM 30 to 90 days.Q: Do you provide samples ? is it free or extra ?A: Yes, we could offer the sample for free charge but do not pay the cost of freight.Q: What is your terms of payment ?A: Payment<=1000USD, 100% in advance.Payment>=1000USD, 30% T/T in advance ,balance before shippment.If you have another question, pls feel free to contact us.Ouradvantages:1:Globallyacceptabequality:Theproductsofferedbyusarethoroughlyexaminedbyourexperiencedprofessionalstoensuretheirdurability,reliabilityandlongservicelife. 2:Competitiveprice:directmanufacturer,reducingallunnecessarycostforyou.3:Professionalteam:20yearsforeigncustomersserviceexperience.Over10yearsinvestment castingmanufacture.Almost35%higheducatedpeople.4:Goodservice:Customerisfirst