ASTM A135 グレードA

TUSPIPE provides ASTM A135 Grade A pipes manufactured under complete A135 standard control. Certified for quality and uniformity, they ensure smooth flow systems and reliable service life in low-pressure applications.

ASTM A135 グレードA

ASTM A135 Grade A is a steel grade used for Electric-Resistance-Welded (ERW) steel pipes. The chemical and mechanical properties of ASTM A135 Grade A pipes make them ideal for use in high-pressure applications, such as conveying gas, vapor, water, or other fluid. In some countries, ASTM A135 Grade A pipes are also used as fire sprinkler pipes. According to the standard, only Grade A pipes are adapted for flanging and bending.

ASTM A135 Grade A is a type of carbon steel that shall be made by either or both basic oxygen or electric-furnace processes. Steel may be cast in ingots or may be strand cast. The pipe shall be manufactured from flat-rolled steel in individual lengths or continuous lengths by electric-resistance or electric-induction welding without the addition of extraneous material. Tensile and chemical requirements of the steel are provided. Specimens of the steel pipes are subject to flattening tests and hydrostatic tests. A nondestructive electric test, either electromagnetic (eddy current) or ultrasonic test, may be preferred as an alternative to the hydrostatic test.

タスパイプを選ぶ理由

1998年以来、天津聯合鋼管有限公司(TUSPIPE)は高品質のラインパイプの供給に尽力しています。

年間生産能力は50万トンを超え、石油・ガス開発、送電、船舶・自動車建造、水・電気、環境保護、機械工学、インフラ建設など、さまざまな分野・業界にサービスを提供している。

TUSPIPEは製品の品質を重視し、厳格な品質管理を行っている。製品の品質を維持するため、2004年から試験検査センターを設立しました。最新の試験・検査設備を備え、引張試験、水力試験、衝撃試験、DWTTなどを実施することができます。

Chemical Composition of ASTM A135 Grade A

エレメント	カーボン	マンガン	リン	硫黄
グレードB	0.3%	1.2%	0.035%	0.035%

Mechanical Properties of ASTM A135 Grade A

ITEM	グレードA
Tensile strength, min, ksi (MPa)	48 (331)
Yield strength, min, ksi (MPa)	30 (207)
Elongation in 2 in. (50 mm), min, %
For pipe having a specified wall thickness of5 ⁄16in. (7.9 mm) or more, if tested using a longitudinal strip test specimen	35
For pipe having a specified wall thickness of less than5 ⁄16 in. (7.9 mm), if tested using a longitudinal strip test specimen	A
For pipe of any size, if tested using a full-size longitudinal test specimen	35

Specifications of ASTM A135 Grade A

The American Society for Testing and Materials ASTM A135 Grade A covers electric-resistance-welded (ERW) steel pipe in sizes NPS 2 to 30, with nominal (average) wall thickness up to 12.7mm, inclusive. It also covers ERW steel pipe in sizes NPS 3/4 to 5 with a nominal (average) wall thickness of 2.11mm to 3.40mm, depending on size. The ASTM A135 standard is widely used in the construction and oil & gas industries because it covers a wide range of applications, including water transmission lines; process piping; distribution piping; condenser and heat exchanger tubes; high-temperature steam lines; and general service lines. This comprehensive listing of standardized pipe dimensions will help engineers and specifiers select the right size pipe for their needs.

外径		壁厚		Weight Of Black Pipes						試験圧力
公称パイプサイズ		スタンダード		スタンダード		Plain End Pipes				試験圧力
INCH	MM	INCH	MM	INCH	MM	KG/MTR	MTR/TON	LB/FT	FT/TON	PSI	KPA
3/4	20	1.050	26.7	0.083*	2.11	1.28	781	0.86	2562	700	4830
1	25	1.315	33.4	0.109*	2.77	2.09	478	1.41	1568	700	4830
1.1/4	32	1.660	42.2	0.109*	2.77	2.69	372	1.81	1221	1000	6890
1.1/2	40	1.900	48.3	0.109*	2.77	3.11	322	2.09	1056	1000	6890
2	50	2.375	60.3	0.109*	2.77	3.93	254	2.64	833	1000	6890
2.1/2	65	2.875	73.0	0.120*	3.05	5.26	190	3.53	623	1000	6890
3	80	3.500	88.9	0.120*	3.05	6.46	155	4.34	509	1000	6890
3.1/2	90	4.000	101.6	0.120*	3.05	7.41	135	4.98	443	1200	8270
4	100	4.500	114.3	0.120*	3.05	8.37	119	5.62	390	1200	8270
5	125	5.563	141.3	0.134*	3.4	11.58	86	7.78	283	1200	8270
6	150	6.625	168.3	0.134*	3.4	13.85	72	9.3	237	1000	6890
8	200	8.625	219.1	0.188**	4.78	25.26	40	16.96	130	800	5520

ASTM A135 グレードA