管道压力等级编号规则

管道压力等级编码规则

一、 采用四位编码组合成管道压力等级，四位编码由字母和数字组成。

PIPING PRESSURE RATING IS COMPOSED OF FOUR CODING,WHICH INCLUDES THREE LETTERS AND ONE DIGIT.

第一位表示：压力等级，用字母A、B、C……等表示。 1st CHARACTER:PRESSURE RATING,USING A,B,C,…AND SO ON 第二位表示：主体材料，用数字1、2、3、4……表示。 2ndCHARACTER:MATERIAL TYPE,USING 0,1,2…AND SO ON 第三位表示：材料的等级，用字母A、B、C……等表示。 3rdCHARACTER: DETAIL MATERIAL,USING A,B,C… AND SO ON 第四位表示：特殊要求，用字母A、B、C……等表示。

4th CHARACTER: SPECIAL REQUIREMENTS,USING A,B,C…AND SO ON 二、 PRESSURE RATING CODE/压力等级编码表

G G GG SPECIAL REQUIREMENTS/特殊要求 DETAIL MATERIAL /材料等级 MATERIAL TYPE /主体材料 PRESSURE RATING/压力级别 1. PRESSURE RATING/压力等级 A 150Lb B 300Lb C 400Lb D 600Lb

1

E 900Lb F 1500Lb G 2500Lb H API2000psi I API3000psi J API5000psi K API10000psi M 125Lb P 75Lb

O NORMAL ATMOSPHERE/常压 2.MATERAIL TYPE/主体材料 0—NONMETAL/非金属 1—ALLOY STEEL/合金钢

2—CARBON STEEL/碳钢

3—CRYOGENIC CARBON STEEL/低温碳钢 4—STAINLESS STEEL/不锈钢

5—DUPLEX STAINLESS STEEL/双相不锈钢 6—COPPER-NICKLE ALLOY/铜镍合金 7—COPPER/铜 8—STANDBY/备用

2

3.DETAIL MATERIAL/材料等级

NONMETAL A ABS D PB G GRE (IMO 753 L3) B PE(HDPE) E SRPE(HDPE) H GRE (UK 00A) C CPVC F GRE ALLOY STEEL A 35CrMo A106 Gr B/20＃API 5L Gr B A53 Gr B 1.5mm CORROSION ALLOWANCE A106 Gr B/20＃API 5L Gr B A53 Gr B B STANDBY CARBON STEEL A E API 5L Gr X42 I API 5L Gr X75 I STANDBY B F API 5L Gr X52 J STANDBY 3mm CORROSION ALLOWANCE A106 Gr B/20＃API 5L Gr B C A53 Gr B G 4.5mm CORROSION ALLOWANC A106 Gr B/20＃API 5L Gr B A53 Gr B D H 6mm CORROSION ALLOWANC API 5L Gr X65 API 5L Gr X70 CRYOGENIC CARBON STEEL A A333 Gr3 B A333 Gr4 C A333 Gr6 E 16Mn STAINLESS STEEL A 316L/OOCr17Ni14Mo2 B 316/0Cr17Ni12Mo2 C 304L/OOCr19Ni D 304/00Cr18Ni E 321/0Cr18Ni11Ti F 317/0Cr19Ni13Mo3 DUPLEX STAINLESS STEEL A S31803 B S32750 COPPER-NICKLE ALLOY C STANDBY G STANDBY F STANDBY 3

A 90-10CuNi B 80-20CuNi C 70-30CuNi D STANDBY COPPER E STANDBY A ALUMINUM BRONZE B RED BRASS C SILICON BRONZE D STANDBY E STANDBY NOTE:1 GRE(IMO 753 L3) IS APPLIED TO WET-PIPE IN FIRE SYSTEM. 2 GRE(UK 00A) IS APPLIED TO DRY-TYPE FIRE SYSTEM.

4.SPECIAL REQUIREMENT/特殊要求

H—TEMPERATURE ≥180℃/用于温度≥180℃以上

G—CARBON STEEL GALVANIZED OR HOT-DIP GALVANIZED/碳钢镀锌或热浸锌 P—CARBON STEEL RESIN-COATED/碳钢涂塑 E—CARBON STEEL EPOXY-COATED/碳钢涂环氧 N—ACCORDANCE TO NACE/满足NACE要求 L—CRYOGENIC/低温

R—CARBON STEEL CAOTING RUBBER/碳钢衬橡胶 Z—NO SPECIAL REQUIREMENT /无特殊要求 EXAMPLE:

A2AG: A---150Lb 2---CARBON STEEL

A---A106 1.5mm CORROSION ALLOWANCE

G---CARBON STEEL GAVALNIZED OR HOT-DIP GAVALNIZED

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