Haihao Group manufacture steel pipes,flanges,butt weld pipe fittings,forged pipe fittings more than 30 years,we have strong experience in flange production and inspection and a complete set of equipments,including advantaced cutting,forging,machining,drilling machines and professional testing ...
The intergranular corrosion(intergranular attack) usually progresses along a narrow path along the grain boundary and,in a severe case of grain-boundary corrosion,entire grains may be dislodged due to complete deterioration of their boundaries.In any case the mechanical properties of the structu ...
This part of ISO 3651 specifies methods for the determination of the resistance to intergranular corrosion of ferritic,austenitic and ferritic-austenitic (duplex) stainless steels in media containing sulfuric acid.It also specifies the purposes which may be assigned to the test.(What is intergra ...
When the stainless steel pipe fittings or flange products are manufactured in our factory,we should keep attention to the intergranular corrosion of such piping products.The microstructure of metals and alloys are made up of grains,and they are separated by grain boundaries.Intergranular corrosi ...
Septermber 29th,inspector from SGS carried out the third party inspection to our stainless steel butt welding pipe fittings in Haihao Factory before shipment.
SGS Inspector Tested Our A403 WP321 Elbows
These pipe fittings will be used in high pressure condition,so clients required many strictly ...
After 20days hard working,Haihao Pipe Fitting Factory finished the steel pipe fittings order from Indian boiler group.
These pipe fittings materials are carbon steel and alloy steel of ASTM A234 which are used for butt weld pipe fittings,and ASTM A182 which are used for forged steel pipe fitting ...
To prepare the Indian Boiler Regulations inspection(IBR),Haihao Pipe Fittings Team did a lot of work for the documents,and worked together with the BV inspector in the following process:
Surface Inspection: Checking 10% quantity Randomly. Mainly Checking the finished products conformity with ...
For prepare Indian Boiler Regulations (IBR) inspection,Haihao Group quality inspection department do a lot of work for the documents.
After that factory should work together with third party inspection,and the process for the IBR Approval it’s just as below:
1.Appearance Checking:Checking ...
Tube China,The All-China International Tube & Pipe Industry Trade Fair, is a 4 day event being held from 26th September to 29th September 2016 at the Shanghai New International Expo Centre(SNIEC) in Shanghai,China.(What is Tube China Exhibition?)
Haihao Group attended Tube China Fair 2016
T ...
To improve manufacturing quality and product reliability,components and structures are regularly inspected for defects or faults which may reduce their structural integrity leading to failure. Among the material testing methods developed for inspection purposes, Non-destructive testing (NDT) tec ...
Haihao Group sales department and engineers attend the 7th Tube China from 26th to 29th september.The Tube China is held every two years.(What is the Tube China Exhibition?)
Haihao Group butt weld pipe fittings
Haihao Group Flange Products
We have taken various product samples and technology d ...
Tube China Exhibition full name is The All-China International Tube & Pipe Industry Trade Fair,which is an international trade fair for piping industry.And the tube china is held every two years in Shanghai City,China.It is one of the world’s largest trade fair for tube and pipe techn ...
Nondestructive testing(NDT) is used in inspecting, testing, or evaluating materials, components or assemblies for discontinuities, or differences in characteristics without destroying the pipes, fittings or flanges products. It means the products can still be used when the inspection or testing ...
In July 20, 2016, The USA International Trade Commission (USITC) deny that revoking the existing antidumping duty orders on carbon steel butt-weld pipe fittings from China, Japan, Taiwan, Thailand and Brazil.They believe it would lead to continuation or recurrence of material injury within a rea ...
In our new flanges order of Oil Gas pipeline project of Africa,the flanges sizes are from 10″ to 36″.Haihao flange factoryproduced all the weld neck flanges,blind flanges and spectacle flanges.
Carbon Steel Spectacle Blind Flange Finished In Haihao Group
As the pipeline projects are ...
Hebei Haihao Flange Factory received this new steel flanges order,it is the supplement of our last flanges order of petro pipeline project of Exxon Mobil in Africa.Because of the excellent performance of our flanges in the first order,customer keep the cooperation with us for similar products.
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There are three types of spectacle flange:the spectacle blind flange,spade flange,spacer flange.The spectacle flange could cut from a plate directly,or produced by forging method.There are the technical specification of spectacle blind flange:
Spectacle Blind Flange In Haihao Group
Material:
Th ...
There are three types of spectacle flange:spacer,spade(paddle flange) and spectacle blind flange.A spectacle blind flange is a combination of a spade and a spacer.
All these three types of spectacle flanges are used in piping systems or pressure vessels where the flow needs to be interrupted fro ...
Spectacle flange(Spectacle Blind Flange)is also called figure-8 blind flange.There are three types spectacle flanges in Hebei Haihao Group:
First one is spectacle blind flange,it is the most regular spectacle flange.The shape of spectacle flange is like glasses.One part is a blind plate,the oth ...
A grooved end joint is a mechanical connection,no welding,no thread.It is fromed with a grooved-end pipes,fittings or valves,and a victualic coupling (or Equal).
Grooved end pipe fittings and flanges
There are the advantage of pipe grooved ends joints:
1.The pipes are grooved by rolled grooving ...
Grooved end joint-it’s a mechanical connection,no welding and no threaded. It is fromed with a grooved-end pipes, fittings or valves,and a victualic coupling (or Equal).The steel pipes or fittings products have a groove on the ends,which called the grooved pipes and fittings.(The pipe end ...
Bevel end is one of the most common pipe ends for the steel pipes and pipe fittings.The bevel end has a lean angle with the pipe surface and suitable for butt welding joints.The bevel end also could be used for deburring the cut ends for safety reasons.
Stainless Steel Pipe Caps And Steel Pipes ...
There are mainly four types of the pipe ends: Plain end (PE), Beveled end (BE),Threaded end (TE), Grooved End.
Pipes and fittings may have different type of ends on both ends,for example,one end is Plain end and the other is Threaded end,or one end is socket weld and the other end is threaded,or ...
