welded steel pipe for sale manufacturer from China Zhongjian Santai (Beijing) International Trading Co., Ltd

Payment Terms:	T/T,L/C
Place of Origin:	Hebei, China (Mainland)


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Product Detail

Means of Transport: Ocean

Packing: as request

Production Capacity: 10000MT/month

Delivery Date: Within 15-30 days after rec...

cold rolled sheet, galvanized steel plate, hot rolled sheet, medium thickness plate, stainless steel coil or sheet, galvanized steel pipe

The details of products:

1 Definition: welded steel pipe is also called welded pipe which is steel pipe formed by welding the curled steel plates or strip steel, with general fixed length of 6m.
2 Production process: raw material uncoiling – flattening – end cutting and welding – looping – molding – welding – internal/external removal of welding beads – precorrection – inductive heat treatment – sizing and straightening – eddy current testing – cutting – water pressure inspection – acid pickling – final inspection (strict control) – packing – delivery
3 Category:
Production methods:
a. Process – electric arc-welded pipes, resistance welded pipe (high frequency, low frequency), gas-welded pipes, furnace butt-welded pipes
b. Welding seam – straight welded pipes, spiral welded pipes
4 Wall Thickness
Thin-wall steel pipes, thick-wall steel pipes
5 End Shape
Circular welded pipes and specially-shaped (square, flat, etc.) welded pipes
6 Length: 6m -12m(capable of being customized and processed according to customer requirements)

7 Surface:Prime quality (bared, oiled, color paint, 3LPE, or other anti-corrosive

treatment)
8 Packing: bundling, nude packing, or packing according to customer requirements
9 Carbon Steel Straight Welded Pipes
Weight (kg) per meter
Note: d (outer diameter); t (wall thickness)
10 Features:
Straight welded pipes feature simple production process, high production efficiency, low cost and high development speed.
The intensity of spiral welded pipes is generally higher than that of straight welded pipes; welded pipes with larger pipe diameters can be produced by relatively narrow blanks; welded pipes with different pipe diameters can be produced blanks with the same width. However, spiral welded pipes have the length increase of 30~100%, as well as lower production speed compared with straight welded pipes with the same length.

11Application:

structure, electric power transmission tower projects, piling, water, oil & gas pipeline

engineering, mechanical industry, municipal projects, roads and its auxiliary facilities, etc.

12 The heoretical weight

Nominal size GB thickness mm

Size			OD	National thickness		Welded pipe theory weight gauge
4inch	15	1/2inch	21.25	2.75	1.26
6inch	20	3/4inch	26.75	2.75	1.63
1inch	25	1inch	33.3	3.25	2.42
1.2inch	32	11/4inch	42.25	3.25	3.13
1.5inch	40	11/2inch	48	3.5	3.84
2inch	50	2inch	60	3.5	4.88
2.5inch	70	21/2inch	75.5	3.75	6.64
3inch	80	3inch	88.5	4.0	8.34
4inch	100	4inch	114	4.0	10.85
5inch	125	5inch	140	4.5	15.04
6inch	150	6inch	165	4.5	17.81
8inch	200	8inch	219	6	31.52

Spiral welded pipe gauge

Specification	Thickness	Kg/m	GB pressure value	Department of hydraulic pressure	Specification	Thickness	Kg/m	GB pressure value	Department of hydraulic pressure
219	6	32.02	9.7	7.7	720	6	106.15	3	2.3
	7	37.1	11.3	9		7	123.59	3.5	2.7
	8	42.13	12.9	10.3		8	140.97	4	3.1
273	6	40.01	7.7	6.2		9	158.31	4.5	3.5
	7	46.42	9	7.2		10	175.6	5	3.9
	8	52.78	10.3	8.3		12	210.02	6	4.7
325	6	47.7	6.5	5.2	820	7	140.85	3.1	2.4
	7	55.4	7.6	6.1		8	160.7	3.5	2.7
	8	63.04	8.7	6.9		9	180.5	4	3.1
377	6	55.4	5.7	4.5		10	200.26	4.4	3.4
	7	64.37	6.7	5.2		11	219.96	4.8	3.8
	8	73.3	7.6	6		12	239.62	5.3	4.1
	9	82.18	8.6	6.8	920	8	180.43	3.1	2.5
	10	91.01	-	7.5		9	202.7	3.5	2.8
426	6	62.25	5.1	4		10	224.92	3.9	3.1
	7	72.83	5.9	4.6		11	247.22	4.3	3.4
	8	82.97	6.8	5.3		12	269.21	4.7	3.7
	9	93.05	7.6	6	1020	8	200.16	2.8	2.2
	10	103.09	8.5	6.7		9	224.89	3.2	2.5
478	6	70.34	4.5	3.5		10	249.58	3.5	2.8
	7	81.81	5.3	4.1		11	274.22	3.9	3
	8	93.23	6	4.7		12	298.81	4.2	3.3
	9	104.6	6.8	5.3	1220	8	239.62	-	1.8
	10	115.92	7.5	5.9		10	298.9	3	2.3
529	6	77.89	4.1	3.2		11	328.47	3.2	2.5
	7	90.61	4.8	3.7		12	357.99	3.5	2.8
	8	103.29	5.4	4.3		13	387.46	3.8	3
	9	115.92	6.1	4.8	1420	10	348.23	2.8	2
	10	128.49	6.8	5.3		14	417.18	3.2	2.4
630	6	92.83	3.4	2.6	1620	12	476.37	2.9	2.1
	7	108.05	4	3.1		14	554.99	3.2	2.4
	8	123.22	4.6	3.6	1820	14	627.04	3.3	2.2
	9	138.33	5.1	4	2020	14	693.09	-	2
	10	153.4	5.7	4.5	2220	14	762.15	-	1.8

Commodity	ERW / LSAW spiral welded steel pipe from China manufacturer
Outer diameter	ERW	LSAW	SSAW
	1/8 - 20 inch (10.3 - 508 mm)	12 - 56 inch (323.8 - 1,420 mm)	8 - 126 inch (219.1 - 3,200 mm)
Wall thickness	0.4 - 16 mm	6.0 - 40 mm	6.0 - 26 mm
Length	5.8 ~ 12.0 m or upon customers' requirements
Standard	GB/T 3091, GB/T 13793, ASTM A252, ASTM A53, ASTM A500, EN 10210, EN 10219, API 5L, DIN 1626/1615, DIN 17120, etc.

Grade	SS400, Q235, Q345, Q460, A572 Gr.50, A572 Gr.60, S235, S275, S355, Grade A/B, X42, X52, X60, X70, etc.

Surface	Prime quality (bared, oiled, color paint, 3LPE, or other anti-corrosive treatment)
Delivery Time	Generally within 30days after receiving the deposit or L/C at sight

Payment Terms	1. T/T: 30% T/T advance, 70% balance copy of B/L 2. L/C: at sight


Port	Tianjin
Application	structure, electric power transmission tower projects, piling, water, oil & gas pipeline engineering, mechanical industry, municipal projects, roads and its auxiliary facilities, etc.

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