China’s Carbon Steel Plate Futures Prices Increase

The Chinese steelmaker Baosteel Group announced its domestic carbon steel plate futures prices for September, based on the August prices, up RMB100/ton.

The prices for hot rolled steel plate will be increased by RMB100/ton, but cancelled preferential prices of RMB50/ton; those for cold rolled and galvanized steel will ve also increased RMB100/ton.

Manufacturing of Seamless Pipes

According to the different production methods can be divided into hot-rolled seamless pipe, cold-rolled seamless pipe, cold-draw seamless pipe, extruded tubes.

1. Hot-rolled seamless pipe is generally automatic pipe mill production. Solid tube inspection and removal of surface defects, cut into desired length, and then sent to the furnace heating, punch a hole in the perforated tube end surface-centering. In the hole while constantly rotating and forward rolls and the role of the head tube gradually formed within the cavity, said capillary. And then sent to the automatic rolling machine to rolling. Finally, both the whole, the whole wall thickness, sizing the sizing mill , to achieve the required specifications. The use to continuous production of hot-rolled seamless steel pipe mill is a more advanced method.

2. For smaller and better-quality seamless cold-rolled, drawn or a combination of methods must be used. Cold rolled normally on a two-rolled normally on a two-roll mill, steel becomes the section round hole slot and does not move tapered head circular hole formed in the rolling. Drawing is usually 0.5 to 100Tsingle chain or double chain drawing machine.

Extrusion method is about 1.3-heating tube closed extrusion cylinder, perforated stick together with the extruded rod movement, extrusion from the small hole in the mold. This method can produce a smaller diameter steel pipe.

We are manufacturer of Carbon Steel Pipes and supply high quality Carbon Steel Pipes in both large and small quantities worldwide & offer you the best prices in the market.

We have a team of experienced professionals with years of experience in manufacturing.

Uses and Application of Casing Pipe

Casing pipe is a type of steel pipe that is typically used to enclose and surround a carrier pipe, which is installed through the center of this pipe. Steel casing pipe is most often used in underground construction projects to encase or protect utility lines from being damaged. This pipe can be used when boring horizontally or directionally under roads, rivers, lakes, or railroads. In general, steel casing pipe is extremely durable and versatile, and therefore, it can be used in a variety of construction projects as well. Casing Pipe is available in a complete variety of different sizes and diameters as well as in straight seam, spiral-weld, and rolled and welded types of manufacture. 

Uses for Casing Pipe

Casing pipe is most often used for underground boring to encase and protect pipe. During horizontal underground boring projects under streets, highways, railroads, rivers, and streams, steel casing pipe can be jacked in segments into an augured hole. The casing pipe segments are then connected together by welding or by using special connections. Another commonly used practice for installing casing pipe is to weld the pipe into a ribbon and then to pull the pipe directionally through a previously drilled hole. This can be used to install casing pipe under highways, railroads, lakes, and rivers. Casing pipe is most often used to protect underground utility lines including water mains, electrical high-voltage lines, natural gas lines, telephone lines, and fiber-optic communication lines. This steel casing protects lines from human activity such as drilling or digging as well as from natural elements. The strength of the steel is a major advantage to the protection of these lines. Because steel casing pipe is extremely durable and available in a variety of sizes, this pipe can also be used in a variety of other applications. Casing pipe can be used for:

a. Road Bore Casing

b. Water Well Casing

c. Culverts Casing

d. Open Cut Casing

e. Oil and Gas Transmission Pipeline Casing

f. Drilling Casing – Surface Casing – Rathole Casing

g. Tunnel Casing

We are manufacturer of Casing Pipes and supply high quality Casing Pipes in both large and small quantities worldwide & offer you the best prices in the market.

We have a team of experienced professionals with years of experience in manufacturing.

API Oil Pipes

The American Petroleum Institute, commonly referred to as API, is the largest U.S trade association for the oil and natural gas industry. It claims to represent about 400 corporations involved in production, refinement, distribution, and many other aspects of the petroleum industry.

Standard API Spec 5L, B, X42, X52, X60, X65, X70, API Spec 5CT (Oil Pipes), API 5D

Drill pipes Grade: E75, X95, G105, S135

Connection:NC26, NC31, NC38, NC40, NC46, NC50, 51/2FH, 6 5/8FH

Heavy Weight Drill pipes Size: 3 1/2″, 4 1/2″, 5″, 5 1/2″

Drill Collar Size: 4 3/4″, 6 1/4″, 6 1/2″, 7″, 8″, 9″, 9 1/2″

Slotted liner and composite screen liner

Grades: pipes is manufactured under PSL 1 and PSL2 requirements.

pipes end: Plain,Threaded, Bevelled

Standard                   OD tolerance                                     WT tolerance

API Spec 5L                    OD＜60.3mm +0.41mm,-0.8mm      +15%, -12.5%

                                           OD≥60.3mm ±0.75%

Special couplings as specified on purchase order.

API 5L tubes (pipes) coatings: sepcificatioin GB and DIN standard

J55, K55,N80, L80 and P110, PSL 1, PSL 2, API 5L, Grade B, API 5L X42, API 5L X46, API 5L X52, API 5L X56, API 5L X60, API 5L X65, API 5L X70, API 5L X80

API 5CT:

There are four steel grades (J55, K55,N80, L80 and P110), two categories (nonupset and external upset) and six sizes (1.9″, 2-3/8″, 2-7/8 “, 3-1/2″, 4″, and 4-1/2″) of tubing.

We are manufacturer of Carbon Steel Pipes and supply high quality Carbon Steel Pipes in both large and small quantities worldwide & offer you the best prices in the market.

We have a team of experienced professionals with years of experience in manufacturing.

Specification Lists of Scaffolding Items

1. The erection of scaffolding must be added a base or foundation, and the foundation of treatment. This project poling brace on the foundation slab directly or old soil, foundation pit bottom add tie bearing. Old soil surface laid foundation pit bottom plate must be smooth and shall not be suspended, placed the base should be pull and pull rod, spacing dimension by the regulation to be fixed after placement. 

2. Steel pipe scaffolding erection sequence is: put sweeping bar (close to the ground of the ledger, height of 20 cm) and by the root set upright, then to sweep the floor and rod fastening of the small bar and rod or sweep the floor and rod fastening, the first step of ledger (with the vertical pole fastening) -  first step putlog - the second step of ledger - adding temporary inclined strut (upper main rail fastening, and the second step in installing two wall behind the bar can be dismantled) - the third step, four main rail and putlog to wall rod with Ann, Ann, put the stud - added a bracing - scaffolding plank.

3. Stud set must be equidistant to straight, the longitudinal spacing shall not be more than 1.8 m. Poling horizontal spacing of 1.0 m, poling from metope to 40 cm. Putlog vertical spacing interval) (that is, the scaffold is 1.8 m, the underlying interval shall not be greater than 2 m, small bar pick out the inside and the length of the stud shall not be less than 30 cm and 15 cm respectively.     Scaffolding outside every 9 m must establish a bracing, and the Angle of the ground should be controlled in 45 ° to 60 ° between top-down set in a row. 

We are manufacturer of Scaffolding Pipes and supply high quality Scaffolding Pipes in both large and small quantities worldwide & offer you the best prices in the market.

We have a team of experienced professionals with years of experience in manufacturing.

Prime Updated In Stock ERW Steel Pipe Price List 2016/08/13

EN10025   S355JR, ERW Steel Pipe, Carbon Steel
Outside Diameter 外径(mm)	Wall Thickness 壁厚 (mm)	Length 长度 (mtr)	Quantity 数量		REMARK 标记 Surface, End	EXW CHINA 出厂价 USD/TON 美金每吨
			PCS 根数	TON 吨位
88.9	3.7	2.3	500	9	Black planting	$479.43
114.3	3.7	2.65	500	13		$476.57
141.3	3.7	4.7	500	27		$476.57
114.3	4.4	2.8	500	35		$482.29
141.3	4.4	3.35	500	49		$486.58
168.3	4.4	5.5	500	15		$485.15
88.9	3.7	2.3	500	9	Galvanised	$639.71
114.3	3.7	2.65	500	14		$639.71
141.3	3.7	4.7	500	31		$639.71
114.3	4.4	2.8	500	18		$628.26
141.3	4.4	3.35	500	26		$628.26
168.3	4.4	5.5	500	52		$621.11
API 5L/A53/A106 GR.B, ERW Steel Pipe, Carbon Steel
Outside Diameter 外径(mm)	Wall Thickness 壁厚 (mm)	Length 长度 (mtr)	Quantity 数量		REMARK 标记 Surface, End	EXW CHINA 出厂价 USD/TON 美金每吨
			PCS 根数	TON 吨位
33.4	3.38	6.1	197	3.00	Black painting	$457.50
42.2	3.56	6.1	387	8.00		$468.61
48.3	3.7	6.1	324	8.00		$461.67
60.3	3.9	6.1	302	10.00		$457.50
73	5.2	6.1	57	3.00		$478.33
88.9	5.5	6.1	145	10.00		$476.94
114.3	6.0	6.1	204	20.00		$460.28
168.3	7.1	6.1	116	20.00		$463.06
219	8.2	6.1	39	10.00		$492.22
273	9.3	6.1	27	10.00		$493.61
33.4	3.24	6	134	1.94	BLACK	$425.30
48.3	4.4	6	89	2.54		$448.55
73	5.2	6	262	13.67		$443.08
76.1	5.5	6	310	17.81	BE. BLACK	$452.56
108	6.2	6	412	38.48	BLACK	$433.50
127	5.1	6	132	12.14	BE. BLACK	$433.50
133	7.6	6	302	42.59	BLACK	$425.30
152	8.2	6	450	78.51	BE. BLACK	$469.50
165	6.2	6	185	26.95		$444.44
168.3	9.6	6	321	72.36	BLACK	$447.48
Note:  1. The above price is based on bare pipe, for extra coating, please contact sales@primesteeltube.com;           2. The above price is based on EXW, for FOB/CIF/CFR price, please contact sales@primesteeltube.com;           3. The above price is not including any packing and end processing charge, for detailed quotation, please contact sales@primesteeltube.com;           4. The above price is only valide during August 13-20;           5. The applicapable MOQ for this price list is over 100 tons;

Hydrostatic Testing of Steel Pipe

For hydrostatic testing purposes, there are two: one is the process of hydraulic test to test whether the leaking pipe, that test tube sealing performance; Another is confirmatory hydrostatic test to test the strength of steel adequacy. In general, low and medium pressure boiler pipe hydrostatic test is part of the process of the hydrostatic test, which is the density of material testing and inspect and whether the material is a continuous dense; it is not verify the strength tests. From the intensity of mechanics of materials theory, seamless steel components are thin and long, and its diameter is very small, even for thin-walled capillary tubes can withstand great pressure. That is to say, when low and medium pressure boiler tubes test pressure, even when there are deep cracks, can not happen leaking.

Hydrostatic test is that many product specification test methods are available. This test can detect leakage of liquid from the inner wall of the case outward can be observed with the naked eye or with a pressure drop to determine. Hydrostatic test can not be found through-wall defects but very close or very close to the wall thickness in depth but not yet fully penetrated defects. Conducted for each pipe eddy current inspection after the low and medium pressure boiler pipe hydrostatic testing is not necessary to replace the hydrostatic test eddy current testing.

Steel pipe hydrostatic testing procedure is as follows:

• test section at the end of block, slow water injection, the tube gas discharge.
• after the steel tube filled with water, water tightness checks.
• made slow progress in steel pressure appropriate USES manual pump, booster time should not less than 10 min.
• stop pressure after test pressure, observe the 10 min, must not exceed 0.02 MPa pressure drop; Then put the testing pressure drop to the working pressure, steel pipe for visual inspection, leak-proof is not qualified.
• after arrival, steel pipe pressure, leakage and pressure drop more than a specified value, check the steel tube, after the reason to discharge the leakage, as stipulated in the above to test again, until it meets the requirements.
• the temperature is lower than 5 ℃ under the environment of water pressure and water capacity, reliable antifreezing measures should be taken, after the test, water should be put.

We are manufacturer of Carbon Steel Pipes and supply high quality Carbon Steel Pipes in both large and small quantities worldwide & offer you the best prices in the market.

We have a team of experienced professionals with years of experience in manufacturing.