API 5L Specifications covers seamless and welded pipe suitable for use in conveying gas, water, oil, and other liquefied media.

1. Grade:Carbon Steel :A53 Gr B / A106 Gr B / API 5L Gr B to Gr X 70

                   Low Temperature Pipes  A333 Gr 3 and Gr 6

                  Stainless Steel & Special Stainess Steel :A312 / SA 312 TP 304/304L, 316/316L, 

                  310, 317, 321, 347, 410, 904, H Grades

                 Alloys Steel  :A335 Gr. P5 / P9 / P11 / P 22 / P91 & P92

                Special Alloys   Nickel Alloys

  Nickel 200/201 - B161 - UNS N02200/N02201        Alloy 400 - B165 - UNS N04400 - Monel® 400

  Alloy 600 - B167- UNS N06600 - Inconel® 600          Alloy 625 - B705 - UNS N06625 - Inconel® 625

 Alloy 800H/800HT - B407 - UNS N08810/N08811 - Incoloy® 800H/HT

    Alloy 825 - B423 - UNS N08825 - Incoloy® 825

          Alloy 276 - B622 - UNS N10276 - Hastelloy® C-276

2. Size: 1/2''----48''

3. Standard: ANSI , JIS , DIN , GOST , EN , 

4. Certification: ISO9001, SGS, CTI, ROHS

5: Detailed information : 

OK Fitting  offers a wide-range of carbon steel pipe products. The term carbon steel pipe can be used to describe a wide range of metal tubular goods whose main alloying element is carbon in a range of 0.12%-2%. Apart from carbon elements like chromium, cobalt, molybdenum, nickel, niobium, titanium, tungsten, vanadium & zirconium can be added to attain respective alloying effect.
For an example A333 grade 6 pipe has high tensile strength and impact properties used at low temperatures application as compared to A106 Grade B pipe with low tensile strength and used at room temperatures or higher temperatures. This is achieved by addition of manganese above the 0.9%, which is limited to 0.65% in A106 pipe.
In general, a pipe is referred as a carbon steel pipe when the maximum specified content of Manganese – 1.65%, Silicon – 0.6% & copper 0.6 % does not exceed the limit prescribed.

Carbon steel pipe are further divided into four categories:   Low carbon steel pipe – Carbon content 0.55-1.05%
Medium carbon steel pipe- Carbon content 0.25-10.6%  High carbon steel pipe- Carbon content 0.9-2.5%
Super High carbon steel pipe- Carbon content 2.5-3.0%
As the Carbon content increases, high carbon steel pipe can become harder and stronger by quenching and tempering with lower ductility.High carbon steel pipe if not heat treated, may result into low weld ability & low melting point.Large diameter pipe used for water transportation and general transit are made of carbon steel.
Depending on the manufacturing method these pipe are divided in 3 different types.

Seamless pipe – pipe formed by passing hot steel through a die to get the shape of a pipe. Carbon steel seamless pipe are manufactured up to a range of 24-(600NB). Though this is the most expensive method due to the machinery and time involved in manufacturing, this is the most reliable method ever invented.
Welded pipe– pipe formed by wrapping a steel sheet in a circular motion, which is then welded at the seam, are known as welded pipe. These pipe are highly in demand due to cheap pricing. Depending on type of requirement these pipe are welded in the following forms

a. ERW: Electro resistance welded pipe  b. EFW: Electro Fusion Welded pipe
c. SAW: Submerged Arc Welded pipe
Casting Mould pipe – The ancient and the oldest method of casting hot liquids.These pipe have a very less demand
Heat Treatment
Carbon Steel pipe can be heat treated in various ways as listed below.
Normalising  Annealing  Quenching   Quenching and Tempering   Austempering   Spherodizing

OK Fitting   is a stockiest and supplier of Carbon steel pipe from China . With a size range of ½–24- in seamless pipe and ½–72- in welded pipe, we provide length variations from 4-7 meters as single random length and 7-13 meters as double random lengths. With black varnished finish and plain or beveled ends we provide cut to length pipe are per client-s requirements.Although many of the same manufacturing principles apply to both carbon steel pipe and various similar alloy tubular goods, the focus of this narrative will be on the manufacturing process of mild carbon steel pipe goods commonly used for oil and gas as well as water transmission, structural applications, general purpose casing, piling, and mechanical components.Carbon steel pipe produced in India are widely used worldwide including crucial markets like south Africa, Australia, Indonesia, Iran, Iraq, Nigeria and Canada.

6： Capillary Pipes and Tubes

Capillary pipes and Capillary tubes in small bore sizes and precise thickness are available as per the requirements of clients. Exceedingly demanded in precise apparatus & instruments, automatic instruments, electronic parts, oil & gas plants and other industries.

RANGE of Capillary pipes and tubes:

0.35mm to 6.35mm OD in thickness ranging from 0.1mm to 1.2mm.

TYPE: SEAMLESS / ERW / WELDED/ SEMI-SEAMLESS / FABRICATED

Grade of stainless steel capillary pipes & tubes:

304, 304L, 304H, 309S, 309H, 310S, 310H, 316, 316TI, 316H, 316L, 316LN, 317, 317L, 321, 321H, 347, 347H, 904L

 Carbon Steel Pipes and Tubes

We offer an array of MSL / ISMT carbon steel seamless pipes in different grades, lengths and thickness. These pipes are resistant to corrosion and are widely appreciated by our clients.

Grade: ASTM A 106 Gr. B, IBR    LT Seamless Pipe , ASTM A 333 Gr.6

Carbon Steel Seamless Boiler Tube IBR BS 3059   Part II / CDS / 360, BS / 3059/ Part II / HFS / 360

ASTM A 210 Din 17175 St 35.8   Heat Exchanger Tube ASTM A 179

API Line Pipes API 5L Gr. B / PSL Gr x 52   ERW Boiler Tubes IBR BS 3059 / Part I - 320

Size Range: 6 mm NB To 24" NB   Thickness: SCH 40, SCH 80, SCH 160, SCH XXS

Length: 6 meter & Double random Length

Alloy Steel Pipes and Tubes

Presenting an array of seamless alloy steel pipes that are widely known for their durability, reliability and competitive pricing. These seamless alloy steel pipes are widely used in different industries like construction, engineering etc.

ASTM A 335 P -1, P -5, P -11, P - 22, P -9   ASTM A 213 T -11, T -22, ASTM 209 T -1

DIN 17175 Grade 3 15Mo3   ASTM 200 P4, P5, P11, P22, P7, P9   ASTM 199 P4, P5, P11,P22, P7,P9
Size : 15 NB To 300 NB

Copper Nickel Pipes and Tubes

We offer a complete range of copper nickel pipes which are designed as per the international quality standards. Also, we are expert in offering customized solutions with high flexibility, deliveries directly from our production plants for large quantity requirements. Bale Defense Industries also stock an extensive range of metal pipes like copper nickel pipes that conforms to one or more of the following MIL specifications, MIL-T-16420K alloy 706 (90/10) and MIL-T-16420K alloy 715 (70/30). These are designed as per DIN specifications, DIN 85004, DIN 86019, DIN 17664, DIN 17671, and DIN 1755.

 Nickel Alloy Pipes and Tubes

We offer a complete range of high nickel pipes for industrial use.

Nickel 200 / 201 Pipes and Tubes   Monel 400 Pipes and Tubes   Monel K500 Pipes and Tubes

Inconel 600 Pipes and Tubes  Inconel 601 Pipes and Tubes   Inconel 625 Pipes and Tubes

Inconel 718 Pipes and Tubes  Incoloy 800 / H / HT Pipes and Tubes  Incoloy 825 Pipes and Tubes

Hastelloy C276 Pipes and Tubes  Hastelloy C22 Pipes and Tubes  Hastelloy B2 Pipes and Tubes
Alloy 20 Pipes and Tubes  904L Pipes and Tubes  Stainless Steel Pipes & Tubes

We have in store for our clients a sturdy range of stainless steel pipes that are capacitated to withstand temperature variations and thus are used in heat transfer process equipment like boilers, super heaters, heat exchangers, condensers and similar applications. These stainless steel pipes can be customized depending upon their industrial usage and hold the following technical details:

Specifications: ASTM A/ASME SA213/A249/A269/A312/A358 CL. I to V ASTM A789/A790

Grades: 304/L/H, 310S/H, 316/L/H/Ti, 317/l, 321/H, 347/H, 904L.UNS S31803/S32760

Form: Seamless, EFSW, ERW.  Size: 1/2" to 24" in Seamless & up to 60" in Welded.

Thickness: SCH 5S TO SCH 160

Packing Details  : Packing, solid bicycle saddle, 50pcs/carton

Delivery Details : 3-30 days after order of Solid bicycle tire tubes