API 5L PSL1 and PSL2 Differences for API 5L Line Pipe

API 5L line pipe of all grades have PSL1 and PSL2 two product specifications, they are different on chemical composition, manufacturing processes, mechanical strength, heat treatment, test records, traceability etc.

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Line pipes in API 5L PSL2 is higher than PSL1

PSL is the short name of product standard level. The product standard level of line pipe have PSL1 and PSL2, also we could say the quality standard divided in PSL1 and PSL2. PSL2 is higher than PSL1, not only the inspection standard is different, also the chemical property, mechanical strength standards are different. So when place the order for the API 5L line pipe, there should be stated clearly for the size, grades these general specification, also have to clarify the production standard leve, PSL1 or PSL2.

PSL2 is more strictly than PSL1 on the chemical properties, tensile strength, non-destructive test, and impact test.

Different impact test methods for PSL1 and PSL2

API 5L PSL1 steel line pipe not required to do the impact test.

For API 5L PSL2 steel line pipe, except Grade X80, all the other grades of API 5L line pipe required the impact test at temperature of 0℃. The average value of Akv: longitudinal direction≥41J, tranverse direction≥27J.

For API 5L Grade X80 PSL2 line pipe, at 0℃ for all the size, impact test the Akv average value: longitudinal direction≥101J, tranverse direction≥68J.

Different hydraulic test for API 5L line pipe in PSL1 and PSL2

For API 5L PSL2 line pipe shall perform the hydraulic test for each single pipe, and in the API standard specification not permit to have Non-destructive test replace the hydraulic test, this also is a big difference between Chinese standard and API 5L standard. For PSL1 not required Non-destructive test, for PSL2 shall do the Non-destructive test for each single pipe.

Different chemical composition for API 5L line pipe in PSL1 and PSL2

Chemical composition and mechanical strength is also different between API 5L PSL1 line pipe and API 5L PSL2 line pipe. For the detailed specification as below. API 5L PSL2 have restrictions with the carbon equivalent content, where for the carbon mass fraction greater than 0.12%, and equal or less than 0.12%. Different CEQ shall be applied. For line pipe in PSL2 tensile strength have maximum limits. More info please review API 5L Specification part 9.2 and 9.3.

Wall Thickness Deviation of Seamless Steel Pipe

​The most common defects for seamless steel pipe is uneven wall thickness. For example carbon steel pipe, thickness deviation from the capillary puncher at least 7.5%, reducing the elongation rolling to 4.5% increase to 7% after expanding, then after tension reducing to 4.5%.

Seamless steel pipe wall thickness deviation performance reasons:

Since puncher in the head with a perforated plunger between the first support frame centering rollers cantilever structure is formed, so that the head during piercing irregular beating, so the head will be uneven force within the tube, causing the wall thickness deviation.

Manufacturing precision equipment and structures

Since the stability of the perforator roll and the guide plate is poor, so that the device generates a large jump in the perforation, the impact of the tube thickness of the device manufacturer; old structure and centering rollers on the roller and is generally due to the lower roller is not an institution drive, so the centering rollers, its center at the time of the actual installation and adjustment, the theory is not easy to pinpoint the center generated when the plunger hold three centering rollers, so that will result in the perforated top radial centering rollers hold the rod being produced uneven stress, poor stability, causing the wall to produce deviations.

Tube heating process

Heating tube is very important, if uneven heating the heating tube, and will produce yin surface discontinuity such that the perforator is offset occurs plug during piercing, resulting in the low temperature side capillary wall thickness of the thin wall high temperature .

Cutting the tube

Quality tube cutting rates will also have a significant impact on the pipe wall thickness deviation, because the use of shears cutting knife edge quality is not high, sings like a horse section generated more serious moments of piercing machine head bite Slide into the produce section, as well as causing eccentric produce thickness deviation.

High Quality Requirement of Seamless Steel Pipes

Seamless steel tube, the very important role in the national economy, is a kind of economic cross-section steel. It is widely applied in many departments such as petroleum, chemical industry, boiler,

power stations, ships, machinery manufacturing, automobile, aviation, aerospace, energy, geology, architecture and military industry and so on.

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2. Classification of Seamless Steel Pipe

(1)According to the cross-section shape: circular cross-section pipe, special-shaped cross-section pipe.

(2)According to the material: carbon steel pipe, alloy steel pipe, stainless steel pipe, composite pipe.

(3)According to the connection ways: threaded pipe, welded pipe.

(4)According to the mode of production: hot rolling (squeeze, top, expand), cold rolling (pull out).

(5)According to utility: boiler tube, OCTG pipe, pipeline, structural pipe, chemical fertilizer pipe.

3. The quality requirements of seamless steel pipe

(1) The steel chemical composition: the chemical composition of steel is one of the most main factors that affect the performance of seamless steel tube, and it is also the main basis that formulates process parameters about rolled tube and heat treatment process of steel tube.

A. Alloy elements: put them according to the purpose

B. Residual elements: put them and properly control when steeling

C. The harmful elements: strictly control (As, Sn, Sb, Bi, Pb), gas (N, H, O)

In Stock ERW Pipe Price Jan 26 - Feb 2, 2018

API 5L/A53 GR.B, ERW Steel Pipe
Outside Diameter	Wall Thickness	Length	Quantity 数量		Remark	EXW CHINA
外径 (mm)	壁厚 (mm)	长度 (mtr)	PCS 根数	TON 吨位	Surface,End	USD/TON
33.4	3.25	6	300	4.35	BLACK	$638.63
42.3	3.75	6	590	12.62	BLACK	$653.68
48.3	3.75	6	659	16.29	BLACK	$644.10
60.3	4.25	6	550	19.39	BE. BLACK	$653.68
73	4.75	6	168	8.06	BE. BLACK	$653.68
88.9	5.00	6	253	15.70	BE. BLACK	$640.00
114.3	6.00	6	187	17.98	BE. BLACK	$638.63
168.3	8.00	6	150	28.46	BE. BLACK	$645.47
193.7	6.80	6	98	18.43	BE. BLACK	$665.98
219	6.80	6	50	10.68	BE. BLACK	$641.37
244.5	5	6	36	6.38	BE. BLACK	$645.47
273	6	6	59	13.98	BE. BLACK	$645.47
177.8	8.0	6	98	19.70	BE. BLACK	$646.84
152	4.8	6	69	7.14	BE. BLACK	$642.74
159	6.80	6	256	39.20	BE. BLACK	$637.26
33.4	2.90	6	333	5.00	BLACK	$630.69
42.2	4.85	6	393	8.00	BLACK	$653.26
48.3	3.68	6	412	10.00	BLACK	$636.33
60.3	3.91	6	50	14.58	BE. BLACK	$650.44
73	5.16	6	618	32.00	BE. BLACK	$651.85
88.9	4.37	6	221	15.00	BE. BLACK	$626.46
114.3	7.14	6	87	9.57	BE. BLACK	$695.59
168.3	7.11	6	50	14.58	BE. BLACK	$694.18
219	8.18	6	106	27.00	BE. BLACK	$687.13
273	9.27	6	22	8.00	BE. BLACK	$646.21
299	11.8	6	32	15.98	BE. BLACK	$699.82
325	12.5	6	112	64.73	BE. BLACK	$688.54
355	11.1	6	126	71.35	BE. BLACK	$695.59
377	13.75	6	78	57.64	BE. BLACK	$702.65
406	12.7	6	66	48.78	BE. BLACK	$709.70
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;
4. The above price is only valide during Jan 26 - Feb 2 ;
5. The applicapable MOQ for this price list is over 25 tons;

In Stock ERW Pipe Price Jan 19 - Jan 26, 2018

API 5L/A53 GR.B, ERW Steel Pipe
Outside Diameter	Wall Thickness	Length	Quantity 数量		Remark	EXW CHINA
外径 (mm)	壁厚 (mm)	长度 (mtr)	PCS 根数	TON 吨位	Surface,End	USD/TON
245	12.70	12	23	20.08	PE. BLACK	$660.00
299	12.70	12	25	26.90	PE. BLACK	$665.28
325	12.70	12	34	39.91	PE. BLACK	$665.28
355	12.70	12	21	27.01	BE. BLACK	$683.61
406	12.70	12	12	17.74	BE. BLACK	$687.78
457	12.70	12	60	100.19	BE. BLACK	$701.67
508	12.70	12	28	52.12	BE. BLACK	$701.67
530	12.70	12	42	81.65	BE. BLACK	$701.67
610	12.70	12	45	101.01	BE. BLACK	$715.56
168.3	5.00	6	35	4.23	BE. BLACK	$644.44
141.3	5.3	6	75	8.00	BE. BLACK	$637.50
114.3	6	6	108	10.38	BE. BLACK	$645.83
273	6.5	6	116	29.73	BE. BLACK	$644.44
219	6.8	6	50	10.60	BE. BLACK	$659.72
340	8.00	6	32	12.58	BE. BLACK	$690.56
33.4	3.38	6	118	1.77	PE. BLACK	$633.33
42.2	3.56	6	291	5.92	PE. BLACK	$638.89
48.3	3.68	6	149	3.62	PE. BLACK	$629.17
60.3	3.91	6	88	2.87	BE. BLACK	$623.61
73	5.16	6	81	4.20	BE. BLACK	$641.67
88.9	5.49	6	172	11.65	BE. BLACK	$645.83
114.3	6.02	6	52	5.02	BE. BLACK	$622.22
168.3	7.11	12	59	20.01	BE. BLACK	$629.17
193.7	6.5	6	23	4.14	BE. BLACK	$623.61
219.1	8.18	12	300	153.17	BE. BLACK	$629.17
244.5	7.5	6	77	20.25	BE. BLACK	$629.17
273.1	9.3	12	76	55.00	BE. BLACK	$604.17
323.9	9.5	6	92	40.78	BE. BLACK	$643.06
406.4	12.7	6	45	33.29	BE. BLACK	$673.61
508	15.09	6	10	11.01	BE. BLACK	$676.39
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;
4. The above price is only valide during Jan 19 - Jan 26 ;
5. The applicapable MOQ for this price list is over 25 tons;