Butterfly-shaped head current national standard
GB/T10752-1995 marine steel pipe butt welding head
GB/T12772-1999 Flexible interface cast iron pipe and fittings for drainage
GB/T 8803-2001 Injection molding of rigid polyvinyl chloride (PVC-U), chlorinated polyvinyl chloride (PVC-C), acrylonitrile-butadiene-styrene terpolymer (ABS) and acrylonitrile- Styrene-acrylate terpolymer (ASA) pipe fitting hot oven test method
GB/T 8802-2001 Determination of Vicat softening temperature of thermoplastic pipes and fittings
GB/T 18251-2000 Method for determination of pigment or carbon black dispersion in polyolefin pipes, tubes and compounds
GB/T 18474-2001 Test method for cross-linking degree of cross-linked polyethylene (PE-X) pipes and fittings
GB/T 18475-2001 Thermoplastic pressure pipes and fittings for the classification and naming of the overall use (design) coefficient
GB/T 18742.3-2002 Polypropylene piping systems for hot and cold water - Part 3: Pipe fittings
GB/T 18991-2003 Thermoplastic pipes and fittings for hot and cold water systems
GB/T 18993.3-2003 Chlorinated polyvinyl chloride (PVC-C) piping systems for hot and cold water - Part 3
GB/T 18998.3-2003 Industrial chlorinated polyvinyl chloride (PVC-C) piping systems - Part 3
GB/T 19228.3-2003 Rubber O-ring seal for stainless steel compression fittings
GB/T 19278-2003 General terms and definitions for thermoplastic pipes, fittings and valves
GB/T 19473.3-2004 Polybutene (PB) piping systems for hot and cold water - Part 3: Pipe fittings
GB/T 12459-2005 Steel butt welded seamless pipe fittings
GB/T 19712-2005 Plastic pipe and fittings polyethylene (PE) saddle bypass impact test method
GB 15558.2-2005 Gas-filled polyethylene (PE) piping systems - Part 2: Pipe fittings
GB/T 13663.2-2005 Polyethylene (PE) piping systems for water supply - Part 2: Pipe fittings
GB/T 19806-2005 Extrusion peeling test of polyethylene electrofusion components for plastic pipes and fittings
GB/T 19807-2005 Preparation of plastic pipe and fittings for polyethylene pipe and electrofusion pipe fittings
GB/T 19808-2005 Tensile peeling test of polyethylene electrofusion assemblies with nominal outer diameter greater than or equal to 90 mm for plastic pipes and fittings
GB/T 19809-2005 Preparation of hot-melt butt joints for plastic pipes and fittings polyethylene (PE) pipe/pipe or pipe/pipe fittings
GB/T 19810-2005 Determination of tensile strength and failure mode of hot-melt butt joints of polyethylene (PE) pipes and fittings
GB/T 13401-2005 steel plate butt welded pipe fittings
GB/T 19993-2005 Thermoplastic circulating pipe system pipe fittings system thermal cycle test method for hot and cold water
GB/T 5836.2-2006 Hard polyvinyl chloride (PVC-U) pipe fittings for building drainage
GB/T 15819-2006 Test methods and technical requirements for environmental stress cracking susceptibility of polyethylene (PE) pipes for irrigation from plug-in fittings
GB/T 20201-2006 polyethylene (PE) pressure pipe mechanical connection pipe fittings for irrigation
GB/T 20207.2-2006 Acrylonitrile-butadiene-styrene (ABS) pressure piping systems - Part 2
GB/T 20674.2-2006 Plastics pipes and fittings - Polyethylene system welding equipment - Part 2
GB/T 20674.1-2006 Plastics pipes and fittings - Polyethylene system welding equipment - Part 1
GB/T 8801-2007 Hard polyvinyl chloride (PVC-U) pipe fittings falling test method
GB/T 21300-2007 Determination of opacity of plastic pipes and fittings
GB/T 21409-2008 General rules for the inspection, installation and use of glass equipment, pipes and fittings
GB/T 21408-2008 versatility and interchangeability of 15mm~150mm caliber pipes and fittings for glass equipment, pipes and fittings
GB/T 14383-2008 Forged socket welding and threaded fittings
GB/T 13295-2008 Ductile iron pipes, fittings and accessories for water and gas pipelines
GB/T 6567.3-2008 Graphical sign fittings for technical drawing piping systems
GB/T 22051-2008 XLPE (PE-X) pipe with sliding sleeve cold expansion pipe fittings
GB/T 6567.5-2008 Axial mapping method for graphical symbols such as graphical symbols for pipelines, fittings and valves
GB/T 11618.1-2008 Copper fittings - Part 1: Brazed fittings
GB/T 12772-2008 Flexible interface cast iron pipe, fittings and accessories for drainage
GB/T 3420-2008 gray cast iron pipe fittings
GB/T 11618.2-2008 Copper fittings - Part 2: Compressed fittings
GB/T 23241-2009 Basic parameters and technical conditions for plastic pipes and fittings for irrigation
GB/T 23682-2009 Refrigeration systems and heat pump hoses, isolation tubes and expansion joints requirements, design and installation
GB/T 24452-2009 Chlorinated polyvinyl chloride (PVC-C) pipes and fittings for sewage and wastewater (high and low temperature) in buildings
GB/T 17457-2009 Ductile iron pipe and fittings cement mortar lining
GB/T 24596-2009 Ductile iron pipe and pipe fitting polyurethane coating
GB/T 24672-2009 Metal thin-walled pipe and fittings for sprinkler irrigation
GB/T 5135.19-2010 Automatic sprinkler systems - Part 19: Plastic pipes and fittings
GB/T 26002-2010 stainless steel corrugated hose and fittings for gas transmission
GB/T 26120-2010 low pressure stainless steel threaded pipe fittings
GB/T 26081-2010 Ductile iron pipes, fittings and accessories for sewage
GB 26255.2-2010 Mechanical pipe fittings for polyethylene pipeline systems - Part 2: Steel-plastic conversion fittings for pipes with a nominal outer diameter greater than 63 mm
GB 26255.1-2010 Mechanical pipe fittings for polyethylene pipeline systems - Part 1 : Steel-plastic conversion fittings for pipes with a nominal outside diameter not exceeding 63 mm
GB/T 26500-2011 General technical requirements for fluoroplastic lining steel pipes and fittings
GB/T 19228.2-2011 Stainless steel compression fittings - Part 2: Thin-walled stainless steel tubes for connection
GB/T 19228.1-2011 stainless steel ferrule fittings - Part 1: Compressed fittings
GB/T 27684-2011 Titanium and titanium alloy seamless and welded pipe fittings
GB/T 27891-2011 Carbon steel compression type pipe fitting butterfly head industry standard
1) "Steel butt welding seamless pipe fittings" GB/T 12459-2005
2) "Steel Welded Pipe Fittings" GB/T 13401-2005
3) "Power station steel butt welded pipe fittings" DL/T 695-1999
SH 3408 steel butt welded seamless pipe fitting SH 3409 steel plate butt welded pipe fittings
SH 3410 Forged steel socket welded pipe fittings
HGJ514-87 carbon steel, low alloy steel seamless butt welded pipe fittings This information comes from the tapered head, no straight edge head, spherical head and other stainless steel head: http://
Flat-bottomed head, butterfly head, spherical head and other stainless steel heads: http://
Stainless steel head: http://
Drag bits are economical tools when drilling softer geological formations and shallower depths. Step Drag Bit instal hard alloy bar .we supply both step drag bits and chevron drag bits. Step drag bits are usually used for drilling overdurdens with sands, clays or soft formations. Compared with chevron drag bits, step drag bits produce large cuttings and more aggressive, however, will be less durable.
drag bits features:
1, All drag bits blades originate from high quality alloy steel forgings.;2, Carbide inserts are individually brazed using 50% nickel silver alloy;
3, Use high grade carbide inserts only;
4, All drag bits are biult to the gauge tolerances
Step-type drag bits are very effective in drilling soft and unconsolidated material. They are available in a full range of sizes from 3-7/8" to 12-1/4".The design of step-type drag bits provides for fast drilling penetration and requires only moderate drilling weight for proper operation. A large center flushing hole is incorporated into our design for efficient removal of cuttings.
Connection threads: N-Rod, AW, 2 3/8"API Reg, 2 7/8" API Reg, 3 1/2" API Reg, 4 1/2" API Reg, 6 5/8" API Reg, 2 7/8" API IF, etc.Wings: Three wings, four wings or as your need .
Step Drag Bit
Step Drag Bit,3 Blades Step Drag Bits,6 Blades Step Drag Bits,Three Wings Step Drag Bits
Hejian Deris Petroleum Drilling Equipment Co.,Ltd. , http://www.welldrillingbit.com